Fix booking count filters, add admin notifications, and improve bookings

UI

init-scripts/init-script.sql

@@ -339,6 +339,17 @@ INSERT INTO business_settings (
     'https://www.website.co.uk'
 );
 
+CREATE TYPE admin_notification_reason AS ENUM ('pending_booking', 'cancelled_booking', 'rescheduled_booking', '1_week_no_pay', '1_month_no_pay', 'affiliate_claim');
+
+CREATE TABLE admin_notifications (
+    id SERIAL PRIMARY KEY,
+    reason admin_notification_reason NOT NULL,
+    booking_id CHAR(12) REFERENCES bookings(id),
+    user_id CHAR(12) REFERENCES users(id),
+    acknowledged_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT NOW()
+);
+
 CREATE INDEX idx_payments_booking_id_status ON payments(booking_id, status);
 CREATE INDEX idx_bookings_start_time_status ON bookings(start_time, status);
 CREATE INDEX idx_users_created_at ON users(created_at);