Add script for deleting hanging app links

alembic/versions/2025_11_23_1850-1bb2dfad3275_eliminate_hanging_data_sources.py

@@ -0,0 +1,32 @@
+"""Eliminate hanging data sources
+
+Revision ID: 1bb2dfad3275
+Revises: c4edeb795134
+Create Date: 2025-11-23 18:50:55.557428
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '1bb2dfad3275'
+down_revision: Union[str, None] = 'c4edeb795134'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.execute("""
+    DELETE FROM ds_app_link_data_source ds
+        USING ds_app_link_meta_url mu,
+              flag_url_validated fuv
+        WHERE ds.url_id = mu.url_id
+          AND ds.url_id = fuv.url_id;
+    """)
+
+
+def downgrade() -> None:
+    pass