fix: Correct Alembic migration chain for search_sites table

app/alembic/versions/b2c3d4e5f6g7_add_search_sites.py

@@ -1,7 +1,7 @@
 """Add search_sites table for product search
 
 Revision ID: b2c3d4e5f6g7
-Revises: a1b2c3d4e5f6
+Revises: performance_indexes_v2
 Create Date: 2025-11-22 10:00:00.000000
 
 """
@@ -14,7 +14,7 @@ from alembic import op
 
 # revision identifiers, used by Alembic.
 revision: str = "b2c3d4e5f6g7"
-down_revision: str | None = "a1b2c3d4e5f6"
+down_revision: str | None = "performance_indexes_v2"
 branch_labels: str | Sequence[str] | None = None
 depends_on: str | Sequence[str] | None = None