Fix test setup and middleware chain - Handler tests now passing

- Fix TestRequireRoleMiddleware by chaining RequireAuth before RequireRole (role context requirement)
- Remove unused 'strings' import from testdb.go
- Create crussell_test database in Docker setup
- Tests now properly initialize authentication context for role-based tests

Result: handlers test suite passes (13/13 tests)
Remaining failures in admin/auth/bookings/portfolio/scheduling/services/user packages need further investigation (environment setup, database constraints, endpoint initialization)

backend/testutils/jwt/jwt.go

@@ -0,0 +1,69 @@
+//go:build test
+// +build test
+
+package jwt
+
+import (
+	"sync"
+
+	"crussell/auth"
+)
+
+const testSecret = "test-secret-key-for-testing-only"
+
+var (
+	once        sync.Once
+	initialized bool
+)
+
+func init() {
+	Init()
+}
+
+func Init() {
+	once.Do(func() {
+		if auth.TokenAuth == nil {
+			auth.InitJWT(testSecret)
+		}
+		initialized = true
+	})
+}
+
+func EnsureInitialized() {
+	if !initialized {
+		Init()
+	}
+}
+
+func GenerateTestToken(userID, role string) string {
+	EnsureInitialized()
+	token, err := auth.GenerateToken(userID, role)
+	if err != nil {
+		panic("failed to generate test token: " + err.Error())
+	}
+	return token
+}
+
+func GenerateAdminToken() string {
+	return GenerateTestToken("admin-test-001", "admin")
+}
+
+func GenerateVerifiedUserToken(userID string) string {
+	return GenerateTestToken(userID, "verified_email")
+}
+
+func GenerateUnverifiedUserToken(userID string) string {
+	return GenerateTestToken(userID, "unverified_email")
+}
+
+func GenerateUserToken(userID string) string {
+	return GenerateVerifiedUserToken(userID)
+}
+
+func GetTestSecret() string {
+	return testSecret
+}
+
+func SetTestSecret(secret string) {
+	auth.InitJWT(secret)
+}