ci(docs): isolate companion checks with verified action pins

Author: ratovarius

.github/workflows/ci.yml

@@ -30,21 +30,6 @@ env:
   SCCACHE_IGNORE_SERVER_IO_ERROR: "true"
 
 jobs:
-  docs-review:
-    name: Docs Review Python Example
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest]
-    env:
-      PYTHONDONTWRITEBYTECODE: "1"
-    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-      - name: Test with synthetic fixtures and stub gws
-        run: |
-          python3 --version
-          python3 -m unittest discover -s examples/docs-review -p 'test_*.py' -v
-
   changes:
     name: Detect Changes
     runs-on: ubuntu-latest

.github/workflows/docs-review.yml

@@ -0,0 +1,46 @@
+# Copyright 2026 Google LLC
+#
+# Licensed 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.
+
+name: Docs Review Example
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  docs-review:
+    name: Docs Review Python Example
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    env:
+      PYTHONDONTWRITEBYTECODE: "1"
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
+      - name: Test with synthetic fixtures and stub gws
+        run: |
+          python3 --version
+          python3 -m unittest discover -s examples/docs-review -p 'test_*.py' -v