Enhance backup command generation and logging for database backups

- Refactored backup utilities for PostgreSQL, MySQL, MariaDB, and MongoDB to streamline command generation and improve logging.
- Introduced a unified `getBackupCommand` function to encapsulate backup command logic, enhancing maintainability.
- Improved error handling and logging during backup processes, providing clearer feedback on command execution and success/failure states.
- Updated container retrieval methods to return null instead of throwing errors when no containers are found, improving robustness.

packages/server/src/utils/docker/utils.ts

@@ -509,7 +509,7 @@ export const getServiceContainer = async (
 		});
 
 		if (containers.length === 0 || !containers[0]) {
-			throw new Error(`No container found with name: ${appName}`);
+			return null;
 		}
 
 		const container = containers[0];
@@ -549,7 +549,7 @@ export const getComposeContainer = async (
 		});
 
 		if (containers.length === 0 || !containers[0]) {
-			throw new Error(`No container found with name: ${appName}`);
+			return null;
 		}
 
 		const container = containers[0];