Enhance cursor rules and add user management functionality

- Updated cursor rules to emphasize the importance of dependency injection and logging practices.
- Introduced a new user management domain, including entities, services, handlers, and validation.
- Implemented user authentication features such as login, registration, and role-based access control.
- Added Redis integration for token management and caching.
- Enhanced API documentation with Swagger for user-related endpoints.
- Updated configuration to support new JWT settings and Redis connection parameters.

internal/user/validation.go

@@ -0,0 +1,35 @@
+package user
+
+// ValidationService defines validation methods for user operations
+type ValidationService interface {
+	IsValidRole(role UserRole) bool
+	IsValidStatus(status UserStatus) bool
+}
+
+// validationService implements the ValidationService interface
+type validationService struct{}
+
+// NewValidationService creates a new validation service
+func NewValidationService() ValidationService {
+	return &validationService{}
+}
+
+// IsValidRole checks if a user role is valid
+func (v *validationService) IsValidRole(role UserRole) bool {
+	switch role {
+	case UserRoleAdmin, UserRoleManager, UserRoleOperator, UserRoleViewer:
+		return true
+	default:
+		return false
+	}
+}
+
+// IsValidStatus checks if a user status is valid
+func (v *validationService) IsValidStatus(status UserStatus) bool {
+	switch status {
+	case UserStatusActive, UserStatusInactive, UserStatusSuspended:
+		return true
+	default:
+		return false
+	}
+}