fix(ci): setup Docker to help running uv-pip-compile.sh in containerized env

Signed-off-by: hainenber <dotronghai96@gmail.com>

.github/workflows/sync-requirements-for-python-dep-upgrade-pr.yml

@@ -32,17 +32,20 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
           persist-credentials: true
 
-      - name: Setup Python
+      # Authenticate the Docker daemon so the python:slim pull in
+      # uv-pip-compile.sh uses our (much higher) authenticated rate limit
+      # instead of the shared-runner anonymous one. Best-effort: on fork PRs the
+      # secrets are unavailable, so this no-ops and the pull falls back to
+      # anonymous (covered by the retry loop in the script).
+      - name: Login to Docker Hub
         if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
-        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        continue-on-error: true
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
-          python-version-file: 'pyproject.toml'
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Install uv
-        if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
-        run: pip install uv
-
-      - name: Sync requirements
+      - name: Sync requirements in containerized environment
         if: ${{ steps.dependabot-metadata.outputs.package-ecosystem == 'pip' }}
         run: ./scripts/uv-pip-compile.sh