fix(alembic): merge nmw mirror chain into staging head

Merging staging left two alembic heads: e2f3a4b5c6d7 (NMW mirror + OGC
views) and x2y3z4a5b6c7 (staging pg_cron matview refresh). Add a merge
revision so `alembic upgrade head` resolves to a single head. Fixes the
bdd-tests CI failure.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: jirhiker

alembic/versions/03ef547ed7be_merge_nmw_mirror_chain_into_staging_head.py

@@ -0,0 +1,26 @@
+"""merge nmw mirror chain into staging head
+
+Revision ID: 03ef547ed7be
+Revises: e2f3a4b5c6d7, x2y3z4a5b6c7
+Create Date: 2026-06-23 19:39:25.256933
+
+"""
+
+from typing import Sequence, Union
+
+
+# revision identifiers, used by Alembic.
+revision: str = "03ef547ed7be"
+down_revision: Union[str, Sequence[str], None] = ("e2f3a4b5c6d7", "x2y3z4a5b6c7")
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    pass
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    pass