Fix cleanup_integration_test_data for feed_id column

- Added feed_id when recreating default follow list activation
- Added deletion of user_feeds for main test user
- Added deletion of user_feeds for other test users (tu*, del*, flu*)
- Uses get_or_create_user_default_feed() for default feed

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>