fix(migrations): merge report-retry-state/compare-chart merge revision with extension storage table head

CI on this branch was failing with "Multiple head revisions are present
for given argument 'head'" because the branch's existing merge revision
(0b99fc576740) didn't account for the extension storage table migration
(e5f6a7b8c9d0), leaving two unmerged heads.

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

Author: rusackas

superset/migrations/versions/2026-08-05_20-00_0be4b8f436f2_merge_report_retry_state_columns_merge_.py

@@ -0,0 +1,35 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""merge report retry state columns merge with extension storage table
+
+Revision ID: 0be4b8f436f2
+Revises: ('0b99fc576740', 'e5f6a7b8c9d0')
+Create Date: 2026-08-05 20:00:00.000000
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = "0be4b8f436f2"
+down_revision = ("0b99fc576740", "e5f6a7b8c9d0")
+
+
+def upgrade():
+    pass
+
+
+def downgrade():
+    pass