feat: add pyproject.toml and CI for ray-serve-apps package

- Restructure ray-serve as proper Python package (ray_serve/)
- Add pyproject.toml with hatch build system
- Add CI workflow to publish to Gitea PyPI
- Add py.typed for PEP 561 compliance
- Aligns with ADR-0019 handler deployment strategy

.gitea/workflows/publish-ray-serve.yaml

@@ -0,0 +1,87 @@
+name: Build and Publish ray-serve-apps
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'ray-serve/**'
+      - '.gitea/workflows/publish-ray-serve.yaml'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'ray-serve/**'
+  workflow_dispatch:
+
+env:
+  NTFY_URL: http://ntfy.observability.svc.cluster.local:80
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install ruff
+        run: pip install ruff
+
+      - name: Lint with ruff
+        run: |
+          cd ray-serve
+          ruff check .
+          ruff format --check .
+
+  publish:
+    needs: lint
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install build tools
+        run: pip install build twine
+
+      - name: Build package
+        run: |
+          cd ray-serve
+          python -m build
+
+      - name: Publish to Gitea PyPI
+        env:
+          TWINE_USERNAME: ${{ secrets.REGISTRY_USER }}
+          TWINE_PASSWORD: ${{ secrets.REGISTRY_TOKEN }}
+        run: |
+          cd ray-serve
+          twine upload --repository-url https://git.daviestechlabs.io/api/packages/daviestechlabs/pypi \
+            dist/*
+
+      - name: Notify on success
+        if: success()
+        run: |
+          curl -s -X POST "${{ env.NTFY_URL }}/builds" \
+            -H "Title: ray-serve-apps published" \
+            -H "Priority: default" \
+            -H "Tags: package,white_check_mark" \
+            -d "Published ray-serve-apps to Gitea PyPI"
+
+      - name: Notify on failure
+        if: failure()
+        run: |
+          curl -s -X POST "${{ env.NTFY_URL }}/builds" \
+            -H "Title: ray-serve-apps publish failed" \
+            -H "Priority: high" \
+            -H "Tags: package,x" \
+            -d "Failed to publish ray-serve-apps to Gitea PyPI"