refactor: improve code formatting and organization across multiple files

backend/migrations/env.py

@@ -57,7 +57,9 @@ def run_migrations_online() -> None:
     )
 
     with connectable.connect() as connection:
-        context.configure(connection=connection, target_metadata=target_metadata, compare_type=True)
+        context.configure(
+            connection=connection, target_metadata=target_metadata, compare_type=True
+        )
 
         with context.begin_transaction():
             context.run_migrations()