update clean embedding cache query logic (#6483)

api/migrations/versions/6e957a32015b_add_embedding_cache_created_at_index.py

@@ -0,0 +1,32 @@
+"""add-embedding-cache-created_at_index
+
+Revision ID: 6e957a32015b
+Revises: fecff1c3da27
+Create Date: 2024-07-19 17:21:34.414705
+
+"""
+from alembic import op
+
+import models as models
+
+# revision identifiers, used by Alembic.
+revision = '6e957a32015b'
+down_revision = 'fecff1c3da27'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('embeddings', schema=None) as batch_op:
+        batch_op.create_index('created_at_idx', ['created_at'], unique=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('embeddings', schema=None) as batch_op:
+        batch_op.drop_index('created_at_idx')
+
+    # ### end Alembic commands ###