🔒️ Add zizmor and fix audit findings (#2260)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.github/workflows/smokeshow.yml

@@ -1,34 +1,48 @@
 name: Smokeshow
 
 on:
-  workflow_run:
+  workflow_run: # zizmor: ignore[dangerous-triggers]
     workflows: [Test Backend]
     types: [completed]
 
+permissions: {}
+
 jobs:
   smokeshow:
     runs-on: ubuntu-latest
+    timeout-minutes: 5
     permissions:
       actions: read
       statuses: write
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.13"
-      - run: pip install smokeshow
+      - name: Setup uv
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
+        with:
+          # Before upgrading uv version, make sure astral-sh/setup-uv knows its checksum.
+          # See: https://github.com/astral-sh/setup-uv/issues/851#issuecomment-4282017837
+          version: "0.11.4"
+          cache-dependency-glob: |
+            pyproject.toml
+            uv.lock
+      - run: uv sync --all-packages --no-dev --group github-actions
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: coverage-html
           path: backend/htmlcov
           github-token: ${{ secrets.GITHUB_TOKEN }}
           run-id: ${{ github.event.workflow_run.id }}
-      - run: smokeshow upload backend/htmlcov
+      - run: uv run smokeshow upload backend/htmlcov
         env:
           SMOKESHOW_GITHUB_STATUS_DESCRIPTION: Coverage {coverage-percentage}
           SMOKESHOW_GITHUB_COVERAGE_THRESHOLD: 90
           SMOKESHOW_GITHUB_CONTEXT: coverage
           SMOKESHOW_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SMOKESHOW_GITHUB_PR_HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
-          SMOKESHOW_AUTH_KEY: ${{ secrets.SMOKESHOW_AUTH_KEY }}
+          SMOKESHOW_AUTH_KEY: ${{ secrets.SMOKESHOW_AUTH_KEY }} # zizmor: ignore[secrets-outside-env]