Backend enhancements: auth, channels, restaurants, daemon improvements

- Add admin auth dependency and role checks
- Expand channel and restaurant API routes
- Improve YouTube transcript fetching
- Enhance daemon worker with better error handling and scheduling

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/run_daemon.py

@@ -1,7 +1,6 @@
 """Run the daemon worker."""
 
 import logging
-import os
 
 from dotenv import load_dotenv
 load_dotenv()
@@ -14,5 +13,4 @@ logging.basicConfig(
 )
 
 if __name__ == "__main__":
-    interval = int(os.environ.get("DAEMON_INTERVAL", "3600"))
-    run_loop(interval)
+    run_loop()