fix(BA-7317): repoint the template migration onto the current alembic head

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: seedspirit

src/ai/backend/manager/models/alembic/versions/4b8e2f7a91d3_convert_prometheus_query_preset_templates_to_jinja.py

@@ -7,7 +7,7 @@
 parsing logic. Idempotent: already-Jinja templates are left untouched.
 
 Revision ID: 4b8e2f7a91d3
-Revises: c8d51e7a3b62
+Revises: e7b2c9f04d31
 Create Date: 2026-08-10 00:00:00.000000
 
 """
@@ -21,7 +21,7 @@
 
 # revision identifiers, used by Alembic.
 revision = "4b8e2f7a91d3"
-down_revision = "c8d51e7a3b62"
+down_revision = "e7b2c9f04d31"
 # Part of: NEXT_RELEASE_VERSION
 branch_labels = None
 depends_on = None