Surface unresolved critical payment states as admin notifications

Adds the scan-critical-payment-logs job (daily 2:45am) that surfaces stale pending payments/till-sales and refunds at the retry cap as admin_notifications with reason='critical_payment_log' — the app has no log/alert pipeline (Gap Backlog T14), so money events that would otherwise sit in un-watched CRITICAL log lines now reach the owner's in-app notification centre. Dedup is NULL-safe (IS NOT DISTINCT FROM) and re-surfaces acknowledged-but-still-unresolved rows. Stopgap until a real alerting pipeline lands.

backend/internal/jobs/cleanup.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log"
 	"log/slog"
 	"time"
 
@@ -231,6 +232,21 @@ func RegisterAll(s *Scheduler) {
 		Concurrency: 1,
 		Handler:     SweepSquareWebhookEvents,
 	})
+
+	// Surfaces unresolved money events (stale pending payments/till sales,
+	// refunds at the retry cap) as admin notifications so the owner sees the
+	// "money may have moved at Square but the DB couldn't record it" situations
+	// that would otherwise live only in un-watched CRITICAL log lines (Gap
+	// Backlog T14). Retire this job when a proper log/alert pipeline (T14
+	// Sentry) lands — the notifications page is the stopgap while the app has
+	// none. Staggered at 2:45am between the 2am and 3am daily batches.
+	s.Register(Job{
+		Name:        "scan-critical-payment-logs",
+		Schedule:    "45 2 * * *", // Daily at 2:45am
+		Timeout:     30 * time.Second,
+		Concurrency: 1,
+		Handler:     ScanCriticalPaymentLogs,
+	})
 }
 
 // SweepSquareWebhookEvents deletes square_webhook_events rows older than 90
@@ -259,3 +275,67 @@ func SweepSquareWebhookEvents(ctx context.Context) (int, error) {
 
 	return int(tag.RowsAffected()), tx.Commit(ctx)
 }
+
+// criticalPaymentStaleAge is how long a pending payment / till sale may sit
+// unresolved before the scan surfaces it to the admin notification centre. A
+// pending row with no update in this window is exactly the "money may have
+// moved at Square but the DB couldn't record it" situation the CRITICAL payment
+// logs describe (handlers.go, giftcards.go, refunds.go, till.go). Deliberately
+// shorter than the 24h stale-pending sweep (handlers/payments/sweep.go) so the
+// owner hears about it while the row could still be rescued.
+const criticalPaymentStaleAge = "2 hours"
+
+// ScanCriticalPaymentLogs surfaces unresolved critical payment states as admin
+// notifications (reason='critical_payment_log'), giving the owner an in-app
+// view of money events that would otherwise be visible only in un-watched
+// CRITICAL log lines (the app has no log/alert pipeline — Gap Backlog T14).
+//
+// Candidates:
+//   - payments / till_sales rows still 'pending' with no update for >2h: a
+//     lost-response charge the DB never recorded.
+//   - refunds rows still 'pending' at the 3-attempt retry cap: a refund the
+//     sweep could not resolve (money may have moved at Square).
+//
+// Each candidate inserts one admin_notifications row keyed on (reason,
+// booking_id) — but ONLY if no unacknowledged notification for that key
+// already exists (NULL-safe via IS NOT DISTINCT FROM, matching the
+// insertRefundFailedNotifications dedup in handlers/payments/refunds.go), so
+// the bell never floods. Acknowledging the notification re-arms the scan:
+// while the row stays unresolved it is surfaced again on the next run.
+//
+// This is the "grep CRITICAL" the audit asked for, but DB-backed since the app
+// has no log pipeline. When a proper log/alert pipeline (T14 Sentry) lands,
+// this job can be retired.
+func ScanCriticalPaymentLogs(ctx context.Context) (int, error) {
+	tag, err := db.Conn.Exec(ctx, `
+		INSERT INTO admin_notifications (reason, booking_id, created_at)
+		SELECT DISTINCT 'critical_payment_log'::admin_notification_reason, src.booking_id, NOW()
+		FROM (
+			-- Lost-response payments: still pending with no update past the threshold.
+			SELECT id, booking_id FROM payments
+			WHERE status = 'pending' AND updated_at < NOW() - INTERVAL '`+criticalPaymentStaleAge+`'
+			UNION ALL
+			-- Lost-response till sales (no booking linkage — booking_id NULL).
+			SELECT id, NULL::CHAR(12) FROM till_sales
+			WHERE status = 'pending' AND updated_at < NOW() - INTERVAL '`+criticalPaymentStaleAge+`'
+			UNION ALL
+			-- Refunds stuck at the 3-attempt retry cap.
+			SELECT id, booking_id FROM refunds
+			WHERE status = 'pending' AND refund_attempts >= 3
+		) src
+		WHERE NOT EXISTS (
+			SELECT 1 FROM admin_notifications an
+			WHERE an.reason = 'critical_payment_log'
+			  AND an.booking_id IS NOT DISTINCT FROM src.booking_id
+			  AND an.acknowledged_at IS NULL
+		)
+	`)
+	if err != nil {
+		return 0, fmt.Errorf("failed to scan critical payment logs: %w", err)
+	}
+	n := int(tag.RowsAffected())
+	if n > 0 {
+		log.Printf("[SCAN] Inserted %d admin_notification(s) for unresolved critical payment states (pending payments/till sales > %s, refunds at retry cap)", n, criticalPaymentStaleAge)
+	}
+	return n, nil
+}

backend/internal/jobs/cleanup_test.go

@@ -87,3 +87,239 @@ func TestSweepSquareWebhookEvents_EmptyTable(t *testing.T) {
 		t.Errorf("expected 0 rows deleted on empty table, got %d", n)
 	}
 }
+
+// ============================================================
+// ScanCriticalPaymentLogs Tests
+// ============================================================
+
+// countCriticalPaymentLogs returns the number of 'critical_payment_log'
+// admin_notifications currently in the shared test database.
+func countCriticalPaymentLogs(ctx context.Context) int {
+	var n int
+	if err := db.Conn.QueryRow(ctx,
+		"SELECT COUNT(*) FROM admin_notifications WHERE reason = 'critical_payment_log'").Scan(&n); err != nil {
+		return -1
+	}
+	return n
+}
+
+// seedStalePendingPayment inserts a payments row still 'pending' with no update
+// past the scan threshold (the "money may have moved at Square but the DB never
+// recorded it" situation).
+func seedStalePendingPayment(t *testing.T) string {
+	t.Helper()
+	ctx := context.Background()
+	var id string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO payments (booking_id, payment_type, payment_method, status, amount, created_at, updated_at)
+		VALUES (NULL, 'full', 'online_square', 'pending', 50.00,
+		        NOW() - INTERVAL '3 hours', NOW() - INTERVAL '3 hours')
+		RETURNING id`).Scan(&id); err != nil {
+		t.Fatalf("failed to seed stale pending payment: %v", err)
+	}
+	return id
+}
+
+// TestScanCriticalPaymentLogs_StalePendingPayment verifies a payments row still
+// 'pending' with no update past the threshold surfaces one admin notification.
+func TestScanCriticalPaymentLogs_StalePendingPayment(t *testing.T) {
+	ctx := context.Background()
+	paymentID := seedStalePendingPayment(t)
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM payments WHERE id = $1", paymentID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+	})
+
+	n, err := ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("ScanCriticalPaymentLogs failed: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("expected 1 notification inserted, got %d", n)
+	}
+	if got := countCriticalPaymentLogs(ctx); got != 1 {
+		t.Errorf("expected 1 critical_payment_log notification, got %d", got)
+	}
+}
+
+// TestScanCriticalPaymentLogs_FreshPendingPaymentNotNotified verifies a pending
+// payment updated within the threshold is NOT surfaced — only rows stuck past
+// the threshold represent an unresolved money event.
+func TestScanCriticalPaymentLogs_FreshPendingPaymentNotNotified(t *testing.T) {
+	ctx := context.Background()
+	var paymentID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO payments (booking_id, payment_type, payment_method, status, amount, created_at, updated_at)
+		VALUES (NULL, 'full', 'online_square', 'pending', 50.00, NOW(), NOW())
+		RETURNING id`).Scan(&paymentID); err != nil {
+		t.Fatalf("failed to seed fresh pending payment: %v", err)
+	}
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM payments WHERE id = $1", paymentID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+	})
+
+	n, err := ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("ScanCriticalPaymentLogs failed: %v", err)
+	}
+	if n != 0 {
+		t.Errorf("expected 0 notifications for a fresh pending payment, got %d", n)
+	}
+}
+
+// TestScanCriticalPaymentLogs_StalePendingTillSale verifies the till_sales scan
+// (no booking linkage — the notification carries a NULL booking_id).
+func TestScanCriticalPaymentLogs_StalePendingTillSale(t *testing.T) {
+	ctx := context.Background()
+
+	var userID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO users (n_first_name, n_last_name, phone, date_of_birth)
+		VALUES ('Test', 'Till', '+447700900123', '1990-01-01')
+		RETURNING id`).Scan(&userID); err != nil {
+		t.Fatalf("failed to seed till user: %v", err)
+	}
+	var saleID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO till_sales (item_type, description, quantity, unit_price, total_amount, payment_method, status, created_by, created_at, updated_at)
+		VALUES ('gift_card', 'gift card', 1, 25.00, 25.00, 'online_square', 'pending', $1,
+		        NOW() - INTERVAL '3 hours', NOW() - INTERVAL '3 hours')
+		RETURNING id`, userID).Scan(&saleID); err != nil {
+		t.Fatalf("failed to seed stale pending till sale: %v", err)
+	}
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM till_sales WHERE id = $1", saleID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM users WHERE id = $1", userID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+	})
+
+	n, err := ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("ScanCriticalPaymentLogs failed: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("expected 1 notification inserted, got %d", n)
+	}
+}
+
+// TestScanCriticalPaymentLogs_DedupAndReArm verifies the dedup guard: a second
+// scan while an unacknowledged notification exists inserts nothing, but
+// acknowledging the notification re-arms the scan while the row stays
+// unresolved (the problem is still present, so it is surfaced again).
+func TestScanCriticalPaymentLogs_DedupAndReArm(t *testing.T) {
+	ctx := context.Background()
+	paymentID := seedStalePendingPayment(t)
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM payments WHERE id = $1", paymentID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+	})
+
+	n, err := ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("first scan failed: %v", err)
+	}
+	if n != 1 {
+		t.Fatalf("expected 1 notification on first scan, got %d", n)
+	}
+
+	// Unacknowledged notification present → the second scan must insert nothing.
+	n, err = ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("second scan failed: %v", err)
+	}
+	if n != 0 {
+		t.Errorf("expected 0 notifications on re-scan while unacknowledged, got %d", n)
+	}
+	if got := countCriticalPaymentLogs(ctx); got != 1 {
+		t.Errorf("expected exactly 1 notification after dedup, got %d", got)
+	}
+
+	// Acknowledging re-arms the scan while the row stays unresolved.
+	if _, err := db.Conn.Exec(ctx, "UPDATE admin_notifications SET acknowledged_at = NOW() WHERE reason = 'critical_payment_log'"); err != nil {
+		t.Fatalf("failed to acknowledge notification: %v", err)
+	}
+	n, err = ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("third scan failed: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("expected 1 notification re-inserted after acknowledge, got %d", n)
+	}
+	if got := countCriticalPaymentLogs(ctx); got != 2 {
+		t.Errorf("expected 2 notifications after re-arm, got %d", got)
+	}
+}
+
+// TestScanCriticalPaymentLogs_RefundAtAttemptCap verifies a refund still
+// 'pending' at the 3-attempt retry cap surfaces a notification (money may have
+// moved at Square but the refund outcome was never recorded).
+func TestScanCriticalPaymentLogs_RefundAtAttemptCap(t *testing.T) {
+	ctx := context.Background()
+
+	var paymentID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO payments (booking_id, payment_type, payment_method, status, amount)
+		VALUES (NULL, 'full', 'online_square', 'completed', 50.00)
+		RETURNING id`).Scan(&paymentID); err != nil {
+		t.Fatalf("failed to seed payment for refund: %v", err)
+	}
+	var refundID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO refunds (payment_id, amount, status, refund_attempts, reason)
+		VALUES ($1, 10.00, 'pending', 3, 'customer request')
+		RETURNING id`, paymentID).Scan(&refundID); err != nil {
+		t.Fatalf("failed to seed refund at attempt cap: %v", err)
+	}
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM refunds WHERE id = $1", refundID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM payments WHERE id = $1", paymentID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+	})
+
+	n, err := ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("ScanCriticalPaymentLogs failed: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("expected 1 notification inserted, got %d", n)
+	}
+	if got := countCriticalPaymentLogs(ctx); got != 1 {
+		t.Errorf("expected 1 critical_payment_log notification, got %d", got)
+	}
+}
+
+// TestScanCriticalPaymentLogs_RefundBelowCapNotNotified verifies only refunds at
+// the 3-attempt cap are surfaced; a pending refund with retries remaining is
+// still being worked by the refund sweep.
+func TestScanCriticalPaymentLogs_RefundBelowCapNotNotified(t *testing.T) {
+	ctx := context.Background()
+
+	var paymentID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO payments (booking_id, payment_type, payment_method, status, amount)
+		VALUES (NULL, 'full', 'online_square', 'completed', 50.00)
+		RETURNING id`).Scan(&paymentID); err != nil {
+		t.Fatalf("failed to seed payment for refund: %v", err)
+	}
+	var refundID string
+	if err := db.Conn.QueryRow(ctx, `
+		INSERT INTO refunds (payment_id, amount, status, refund_attempts, reason)
+		VALUES ($1, 10.00, 'pending', 1, 'customer request')
+		RETURNING id`, paymentID).Scan(&refundID); err != nil {
+		t.Fatalf("failed to seed refund below attempt cap: %v", err)
+	}
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM refunds WHERE id = $1", refundID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM payments WHERE id = $1", paymentID)
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+	})
+
+	n, err := ScanCriticalPaymentLogs(ctx)
+	if err != nil {
+		t.Fatalf("ScanCriticalPaymentLogs failed: %v", err)
+	}
+	if n != 0 {
+		t.Errorf("expected 0 notifications for a refund below the attempt cap, got %d", n)
+	}
+}

backend/internal/jobs/scheduler_test.go

@@ -413,8 +413,8 @@ func TestRegisterAll_RegistersExpectedJobs(t *testing.T) {
 	s := New()
 	RegisterAll(s)
 
-	if got := len(s.registry); got != 24 {
+	if got := len(s.registry); got != 25 {
-		t.Fatalf("RegisterAll() registered %d jobs, want 24", got)
+		t.Fatalf("RegisterAll() registered %d jobs, want 25", got)
 	}
 
 	registered := make(map[string]Job, len(s.registry))
@@ -492,6 +492,7 @@ func expectedJobNames() map[string]bool {
 		"cleanup-refresh-tokens":              true,
 		"sweep-square-webhook-events":         true,
 		"apply-default-hours":                 true,
+		"scan-critical-payment-logs":          true,
 	}
 }