ci: enforce workflow policy

.github/workflows/ci.yml

@@ -7,13 +7,13 @@ on:
 jobs:
   lint:
     name: Lint & Typecheck
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
       - name: Install poetry
         run: pipx install poetry
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.14"
           cache: "poetry"
@@ -25,7 +25,7 @@ jobs:
         run: poetry run mypy src tests
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
@@ -45,15 +45,15 @@ jobs:
           --health-start-period 10s
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
         with:
           submodules: recursive
 
       - name: Install poetry
         run: pipx install poetry
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: "poetry"

.github/workflows/release-please.yml

@@ -7,14 +7,14 @@ on:
 
 jobs:
   check:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     permissions:
       contents: write
       pull-requests: write
 
     steps:
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@8b8fd2cc23b2e18957157a9d923d75aa0c6f6ad5 # v4
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -29,19 +29,19 @@ jobs:
 
     if: ${{ needs.check.outputs.release_created }}
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     permissions:
       contents: write
       pull-requests: write
       id-token: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
         with:
           persist-credentials: false
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.14"
       - name: Install dependencies
@@ -52,4 +52,4 @@ jobs:
         run: |
           poetry build
       - name: Publish to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1

.github/workflows/semantic-pr.yml

@@ -13,10 +13,10 @@ permissions:
 jobs:
   semantic-pr:
     name: Validate PR title
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Validate title
-        uses: amannn/action-semantic-pull-request@v5
+        uses: amannn/action-semantic-pull-request@e32d7e603df1aa1ba07e981f2a23455dee596825 # v5
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:

.github/workflows/semantic-pull-request.yml

@@ -9,8 +9,8 @@ on:
 jobs:
   main:
     name: Validate PR title
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
-      - uses: amannn/action-semantic-pull-request@v5
+      - uses: amannn/action-semantic-pull-request@e32d7e603df1aa1ba07e981f2a23455dee596825 # v5
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}