feat(backup): Add backup system: BackupManager, DB schema, API endpoints and UI support

Introduce a complete service backup/restore subsystem with encrypted archives, database records and REST endpoints. Implements BackupManager with export/import for service config, platform resources (MongoDB, MinIO, ClickHouse), and Docker images; adds BackupRepository and migrations for backups table and include_image_in_backup; integrates backup flows into the HTTP API and the UI client; exposes backup password management and restore modes (restore/import/clone). Wire BackupManager into Onebox initialization.

ts/database/repositories/service.repository.ts

@@ -119,6 +119,10 @@ export class ServiceRepository extends BaseRepository {
       fields.push('platform_requirements = ?');
       values.push(JSON.stringify(updates.platformRequirements));
     }
+    if (updates.includeImageInBackup !== undefined) {
+      fields.push('include_image_in_backup = ?');
+      values.push(updates.includeImageInBackup ? 1 : 0);
+    }
 
     fields.push('updated_at = ?');
     values.push(Date.now());
@@ -172,6 +176,9 @@ export class ServiceRepository extends BaseRepository {
       autoUpdateOnPush: row.auto_update_on_push ? Boolean(row.auto_update_on_push) : undefined,
       imageDigest: row.image_digest ? String(row.image_digest) : undefined,
       platformRequirements,
+      includeImageInBackup: row.include_image_in_backup !== undefined
+        ? Boolean(row.include_image_in_backup)
+        : true, // Default to true
     };
   }
 }