fix(migrations): resolve multiple Alembic heads causing CI test crash

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

migrations/versions/010_add_embedding_column.py

@@ -0,0 +1,27 @@
+"""Add embedding column to files table for document similarity
+
+Revision ID: 010_add_embedding_column
+Revises: 009_add_webhook_configs
+Create Date: 2026-03-01
+
+"""
+
+from typing import Union
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "010_add_embedding_column"
+down_revision: Union[str, None] = "009_add_webhook_configs"
+depends_on: Union[str, None] = None
+
+
+def upgrade() -> None:
+    """Add embedding column to files table for storing text embedding vectors."""
+    op.add_column("files", sa.Column("embedding", sa.Text(), nullable=True))
+
+
+def downgrade() -> None:
+    """Remove embedding column from files table."""
+    op.drop_column("files", "embedding")