fix: update .gitignore and import order in remove_preview_thumb_column.py

- add /.playwright-mcp/ to .gitignore
- reorder import statements for consistency

Author: MarkusNeusinger

.gitignore

@@ -240,3 +240,4 @@ agentic/runs/
 # Docker
 docker-compose.override.yml
 secrets/
+/.playwright-mcp/

alembic/versions/b833d85c09ed_remove_preview_thumb_column.py

@@ -7,9 +7,10 @@
 """
 from typing import Sequence, Union
 
-from alembic import op
 import sqlalchemy as sa
 
+from alembic import op
+
 
 # revision identifiers, used by Alembic.
 revision: str = 'b833d85c09ed'