refactor(ci): Update Release announcement workflow.

Make it part of the `Release new version` GH Action workflow, dependent of the `github-release` and `publish-to-pypi` job steps.

This will avoid announcement of the AWS Lambda releases.

Signed-off-by: Paulo Vital <[email protected]>

Author: pvital

.github/workflows/pkg_release.yml

@@ -80,3 +80,40 @@ jobs:
           path: dist/
       - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
+
+  notify-slack:
+    name: Notify on Slack
+    needs:
+      - github-release
+      - publish-to-pypi
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Fetch all history to access commit messages
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.13'
+
+      - name: Install dependencies
+        run: |
+          pip install httpx PyGithub
+
+      # Send notification using the safely set environment variables
+      - name: Send Slack notification
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_RELEASE_TAG: ${{ github.ref_name }}
+          SLACK_TOKEN: ${{ secrets.RUPY_TRACER_RELEASES_TOKEN }}
+          SLACK_SERVICE: ${{ secrets.RUPY_TRACER_RELEASES_CHANNEL_ID }}
+          SLACK_TEAM: ${{ secrets.RUPY_TOWN_CRIER_SERVICE_ID }}
+        run: |
+          echo "New release published ${GITHUB_RELEASE_TAG}"
+          python .github/scripts/announce_release_on_slack.py
+