refactor: use custom worker script instead of standard RQ CLI

- Add scripts/rq-docker for Docker container compatibility
- Update Dockerfile to copy scripts directory
- Replace standard rq worker command with custom worker script
- Custom worker includes built-in scheduling via _drain_ready_scheduled_tasks

Co-authored-by: abhi1693 <5083532+abhi1693@users.noreply.github.com>

compose.yml

@@ -75,7 +75,7 @@ services:
     build:
       context: .
       dockerfile: backend/Dockerfile
-    command: ["rq", "worker", "--with-scheduler", "-u", "redis://redis:6379/0"]
+    command: ["python", "scripts/rq-docker", "worker"]
     env_file:
       - ./backend/.env
     depends_on: