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/backup.repository.ts

@@ -0,0 +1,86 @@
+/**
+ * Backup Repository
+ * Handles CRUD operations for backups table
+ */
+
+import { BaseRepository } from '../base.repository.ts';
+import type { IBackup, TPlatformServiceType } from '../../types.ts';
+
+export class BackupRepository extends BaseRepository {
+  create(backup: Omit<IBackup, 'id'>): IBackup {
+    this.query(
+      `INSERT INTO backups (
+        service_id, service_name, filename, size_bytes, created_at,
+        includes_image, platform_resources, checksum
+      ) VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+      [
+        backup.serviceId,
+        backup.serviceName,
+        backup.filename,
+        backup.sizeBytes,
+        backup.createdAt,
+        backup.includesImage ? 1 : 0,
+        JSON.stringify(backup.platformResources),
+        backup.checksum,
+      ]
+    );
+
+    // Get the created backup by looking for the most recent one with matching filename
+    const rows = this.query(
+      'SELECT * FROM backups WHERE filename = ? ORDER BY id DESC LIMIT 1',
+      [backup.filename]
+    );
+
+    return this.rowToBackup(rows[0]);
+  }
+
+  getById(id: number): IBackup | null {
+    const rows = this.query('SELECT * FROM backups WHERE id = ?', [id]);
+    return rows.length > 0 ? this.rowToBackup(rows[0]) : null;
+  }
+
+  getByService(serviceId: number): IBackup[] {
+    const rows = this.query(
+      'SELECT * FROM backups WHERE service_id = ? ORDER BY created_at DESC',
+      [serviceId]
+    );
+    return rows.map((row) => this.rowToBackup(row));
+  }
+
+  getAll(): IBackup[] {
+    const rows = this.query('SELECT * FROM backups ORDER BY created_at DESC');
+    return rows.map((row) => this.rowToBackup(row));
+  }
+
+  delete(id: number): void {
+    this.query('DELETE FROM backups WHERE id = ?', [id]);
+  }
+
+  deleteByService(serviceId: number): void {
+    this.query('DELETE FROM backups WHERE service_id = ?', [serviceId]);
+  }
+
+  private rowToBackup(row: any): IBackup {
+    let platformResources: TPlatformServiceType[] = [];
+    const platformResourcesRaw = row.platform_resources;
+    if (platformResourcesRaw) {
+      try {
+        platformResources = JSON.parse(String(platformResourcesRaw));
+      } catch {
+        platformResources = [];
+      }
+    }
+
+    return {
+      id: Number(row.id),
+      serviceId: Number(row.service_id),
+      serviceName: String(row.service_name),
+      filename: String(row.filename),
+      sizeBytes: Number(row.size_bytes),
+      createdAt: Number(row.created_at),
+      includesImage: Boolean(row.includes_image),
+      platformResources,
+      checksum: String(row.checksum),
+    };
+  }
+}