Add Spotify integration with improved token management and user interface

- Implemented Spotify OAuth handling in spotify_client_manager.py to ensure valid access tokens for users.
- Created helper functions in spotify_helper.py for refreshing tokens and retrieving user information.
- Developed manage_spotify.html template for connecting and managing Spotify accounts, displaying connection status and token information.
- Added logging for token management processes to enhance debugging and monitoring.
- Introduced a debug client for Spotify interactions to facilitate easier testing and development.

docker-entrypoint.sh

@@ -1,10 +1,6 @@
 #!/bin/bash
 set -e
 
-# Run the OAuth migration script first
-echo "Running database migration for OAuth providers..."
-python run_migration.py
-
 # Start the Flask application with better error reporting
 echo "Starting Flask application..."
 export PYTHONUNBUFFERED=1