feat(backup): add containerarchive-backed backup storage, restore, download, and pruning support

ts/database/migrations/migration-014-containerarchive.ts

@@ -0,0 +1,13 @@
+import { BaseMigration } from './base-migration.ts';
+import type { TQueryFunction } from '../types.ts';
+
+export class Migration014ContainerArchive extends BaseMigration {
+  readonly version = 14;
+  readonly description = 'Add containerarchive snapshot tracking to backups';
+
+  up(query: TQueryFunction): void {
+    query('ALTER TABLE backups ADD COLUMN snapshot_id TEXT');
+    query('ALTER TABLE backups ADD COLUMN stored_size_bytes INTEGER DEFAULT 0');
+    query('CREATE INDEX IF NOT EXISTS idx_backups_snapshot ON backups(snapshot_id)');
+  }
+}

ts/database/migrations/migration-runner.ts

@@ -20,6 +20,7 @@ import { Migration010BackupSchedules } from './migration-010-backup-schedules.ts
 import { Migration011ScopeColumns } from './migration-011-scope-columns.ts';
 import { Migration012GfsRetention } from './migration-012-gfs-retention.ts';
 import { Migration013AppTemplateVersion } from './migration-013-app-template-version.ts';
+import { Migration014ContainerArchive } from './migration-014-containerarchive.ts';
 import type { BaseMigration } from './base-migration.ts';
 
 export class MigrationRunner {
@@ -44,6 +45,7 @@ export class MigrationRunner {
       new Migration011ScopeColumns(),
       new Migration012GfsRetention(),
       new Migration013AppTemplateVersion(),
+      new Migration014ContainerArchive(),
     ].sort((a, b) => a.version - b.version);
   }