ci(workflows): streamline CI and remove redundant builds (#31)

Streamline the CI and release workflows:

- ci.yaml is now PR-only (no push-to-main re-run) and keeps only lint and
  dependency-review; the gateway-image local build/smoke job is removed.
- Split the path-sensitive jobs into ci-python.yaml and ci-manifests.yaml,
  each using native on.pull_request.paths filtering so unrelated PRs skip them.
- Drop the duplicate check-manifests.py run from the lint job.
- release.yaml: skip the tests job steps for tags already on main (where PR CI
  already ran), keeping them only for release-branch tags.

Co-authored-by: SREDevOpsAgents <agents@sredevops.org>

.github/workflows/ci.yaml

@@ -1,12 +1,11 @@
-# Continuous integration: lint, unit tests, manifest dry-run, gateway image
-# smoke test and dependency review. Job names are the required branch-protection
-# checks documented in docs/gitflow.md.
+# Continuous integration: lint and dependency review. Job names are the required
+# branch-protection checks documented in docs/gitflow.md. The gateway unit tests
+# and the manifest dry-run live in ci-python.yaml / ci-manifests.yaml so each can
+# use native on.pull_request.paths filtering and skip unrelated changes.
 name: CI
 
 on:
   pull_request:
-  push:
-    branches: [main]
   workflow_dispatch:
 
 permissions:
@@ -58,7 +57,6 @@ jobs:
           set -euo pipefail
           ./scripts/check-versions.sh
           ./scripts/check-examples.sh
-          python scripts/check-manifests.py
       - name: Shellcheck
         run: shellcheck -x build.sh scripts/*.sh examples/*/scripts/*.sh
       - name: Actionlint
@@ -77,169 +75,6 @@ jobs:
             --offline --no-progress --verbose
             ./README.md ./CONTRIBUTING.md ./SECURITY.md ./AGENTS.md ./docs ./examples
 
-  python:
-    name: python
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    defaults:
-      run:
-        working-directory: examples/dsh-agents-as-a-service/gateway
-    steps:
-      - name: Checkout
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-      - name: Set up Python
-        uses: actions/setup-python@6d4fd22b20465ccc0f7354476588e8df7c9ca0e0 # v7.1.0
-        with:
-          python-version: "3.12"
-          cache: pip
-          cache-dependency-path: |
-            examples/dsh-agents-as-a-service/gateway/requirements.txt
-            examples/dsh-agents-as-a-service/gateway/requirements-dev.txt
-      - name: Install dependencies
-        run: |
-          set -euo pipefail
-          python -m pip install --upgrade pip
-          pip install -r requirements.txt -r requirements-dev.txt
-      - name: Lint
-        run: |
-          set -euo pipefail
-          python -m ruff check .
-          python -m ruff format --check .
-      - name: Unit tests with coverage
-        run: >-
-          python -m pytest -q
-          --cov=. --cov-report=xml:coverage.xml --cov-report=term
-          --junitxml=junit.xml
-      - name: Coverage summary
-        run: |
-          set -euo pipefail
-          {
-            echo "### Gateway test coverage"
-            python -m coverage report
-          } >> "$GITHUB_STEP_SUMMARY"
-      - name: Upload test artefacts
-        if: always()
-        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
-        with:
-          name: gateway-test-results
-          path: |
-            examples/dsh-agents-as-a-service/gateway/junit.xml
-            examples/dsh-agents-as-a-service/gateway/coverage.xml
-          if-no-files-found: warn
-          retention-days: 7
-
-  manifests:
-    name: manifests
-    runs-on: ubuntu-latest
-    timeout-minutes: 25
-    steps:
-      - name: Checkout
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-      - name: Create kind cluster
-        uses: helm/kind-action@1544676c07bb3570fcb70166beaa07c4528fd4aa # v1.15.1
-        with:
-          version: v0.33.0
-          cluster_name: dsh-ci
-      - name: Read versions.env
-        run: |
-          set -euo pipefail
-          while IFS= read -r line; do
-            case "$line" in ''|'#'*) continue ;; esac
-            echo "$line" >> "$GITHUB_ENV"
-          done < versions.env
-      - name: Install agent-sandbox and Gateway API CRDs
-        run: |
-          set -euo pipefail
-          kubectl apply -f "https://github.com/kubernetes-sigs/agent-sandbox/releases/download/$AGENT_SANDBOX_VERSION/sandbox-with-extensions.yaml"
-          kubectl wait --for=condition=Established crd/sandboxtemplates.extensions.agents.x-k8s.io --timeout=180s
-          kubectl wait --for=condition=Established crd/sandboxwarmpools.extensions.agents.x-k8s.io --timeout=180s
-          kubectl wait --for=condition=Established crd/sandboxclaims.extensions.agents.x-k8s.io --timeout=180s
-          kubectl wait --for=condition=Established crd/sandboxes.agents.x-k8s.io --timeout=180s
-          kubectl apply -f "https://github.com/kubernetes-sigs/gateway-api/releases/download/$GATEWAY_API_VERSION/standard-install.yaml"
-          kubectl wait --for=condition=Established crd/gateways.gateway.networking.k8s.io --timeout=180s
-          kubectl wait --for=condition=Established crd/httproutes.gateway.networking.k8s.io --timeout=180s
-      - name: Set up Python
-        uses: actions/setup-python@6d4fd22b20465ccc0f7354476588e8df7c9ca0e0 # v7.1.0
-        with:
-          python-version: "3.12"
-      - name: Install check dependencies
-        run: pip install "pyyaml==6.0.3"
-      - name: Validate manifest shape
-        run: python scripts/check-manifests.py
-      - name: Validate manifests (server dry-run)
-        run: |
-          set -euo pipefail
-          kubectl create namespace dsh-demo
-          shopt -s globstar nullglob
-          count=0
-          for file in examples/*/manifests/**/*.yaml; do
-            case "$file" in *.yaml.example) continue ;; esac
-            echo "== $file =="
-            kubectl apply --dry-run=server -f "$file"
-            count=$((count + 1))
-          done
-          if [ "$count" -eq 0 ]; then
-            echo "no manifests were validated" >&2
-            exit 1
-          fi
-          echo "validated $count manifests"
-
-  gateway-image:
-    name: gateway-image
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    steps:
-      - name: Checkout
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-      - name: Build gateway image
-        run: docker build -t dsh-aaas-gateway:ci examples/dsh-agents-as-a-service/gateway/
-      - name: Smoke-test /healthz without a cluster
-        run: |
-          set -euo pipefail
-          cat > /tmp/kubeconfig <<'EOF'
-          apiVersion: v1
-          kind: Config
-          clusters:
-            - name: dummy
-              cluster:
-                server: https://127.0.0.1:6443
-                insecure-skip-tls-verify: true
-          contexts:
-            - name: dummy
-              context:
-                cluster: dummy
-                user: dummy
-          users:
-            - name: dummy
-              user: {}
-          current-context: dummy
-          EOF
-          docker run -d --name gateway-smoke \
-            -p 18080:8080 \
-            -e NAMESPACE=dsh-demo \
-            -e POOL=dsh-pool \
-            -e KUBECONFIG=/tmp/kubeconfig \
-            -v /tmp/kubeconfig:/tmp/kubeconfig:ro \
-            dsh-aaas-gateway:ci
-          trap 'docker logs gateway-smoke || true; docker rm -f gateway-smoke || true' EXIT
-          code=""
-          for _ in $(seq 1 30); do
-            code=$(curl -s -o /dev/null -w '%{http_code}' http://localhost:18080/healthz || true)
-            [ "$code" = "200" ] && break
-            sleep 1
-          done
-          if [ "$code" != "200" ]; then
-            echo "gateway /healthz returned '$code' instead of 200" >&2
-            exit 1
-          fi
-          echo "gateway image healthy: GET /healthz -> 200"
-
   dependency-review:
     name: dependency-review
     if: github.event_name == 'pull_request'