feat(tests): enhance integration tests for CrowdSec and Coraza, improve error handling and logging

- Updated `coraza_integration_test.go` and `crowdsec_integration_test.go` for better logging and error handling.
- Added `ttlRemainingSeconds` to `CrowdsecHandler` to provide remaining TTL in responses.
- Improved error messages in `ApplyPreset` and `GetCachedPreset` methods for better user guidance.
- Enhanced test coverage for applying presets, including scenarios for cache misses and expired caches.
- Introduced new tests for cache refresh logic and ensured proper rollback behavior during failures.
- Updated QA report with recent testing outcomes and observations.

backend/internal/database/database.go

@@ -51,7 +51,7 @@ func Connect(dbPath string) (*gorm.DB, error) {
 func configurePool(sqlDB *sql.DB) {
 	// SQLite is file-based, so we limit connections
 	// but keep some idle for reuse
-	sqlDB.SetMaxOpenConns(1)   // SQLite only allows one writer at a time
-	sqlDB.SetMaxIdleConns(1)   // Keep one connection ready
+	sqlDB.SetMaxOpenConns(1)    // SQLite only allows one writer at a time
+	sqlDB.SetMaxIdleConns(1)    // Keep one connection ready
 	sqlDB.SetConnMaxLifetime(0) // Don't close idle connections
 }