feat(backup): Add backup scheduling system with GFS retention, API and UI integration

ts/plugins.ts

@@ -41,6 +41,10 @@ export { smartregistry };
 import * as smarts3 from '@push.rocks/smarts3';
 export { smarts3 };
 
+// Task scheduling and cron jobs
+import * as taskbuffer from '@push.rocks/taskbuffer';
+export { taskbuffer };
+
 // Crypto utilities (for password hashing, encryption)
 import * as bcrypt from 'https://deno.land/x/bcrypt@v0.4.1/mod.ts';
 export { bcrypt };