Add database initialization for first superuser setup

Introduced a script to create the initial superuser during app startup if none exists. Updated the entrypoint to call this script and added stricter logging for passlib. Adjusted .env.template for a stronger default superuser password.

backend/entrypoint.sh

@@ -4,5 +4,8 @@ echo "Starting Backend"
 
 # Apply database migrations
 alembic upgrade head
+
+python app/init_db.py
+
 # Execute the command passed to docker run
 exec "$@"