Add GH CI smoke tests

Author: vikin91

.github/workflows/ci.yml

@@ -60,6 +60,70 @@ jobs:
       - name: Validate rules
         run: ./bin/metrics-analyzer validate ./automated-rules
 
+  container-smoke:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Read version
+        id: version
+        run: echo "version=$(cat VERSION)" >> "$GITHUB_OUTPUT"
+
+      - name: Set build time
+        id: build_time
+        run: echo "build_time=$(date -u +%Y-%m-%dT%H:%M:%SZ)" >> "$GITHUB_OUTPUT"
+
+      - name: Build image
+        run: |
+          docker build \
+            --build-arg VERSION="${{ steps.version.outputs.version }}" \
+            --build-arg BUILD_TIME="${{ steps.build_time.outputs.build_time }}" \
+            -t sma:ci .
+
+      - name: Start container
+        run: |
+          docker run -d --rm --name sma-ci -p 8080:8080 sma:ci
+
+      - name: Wait for readiness
+        run: |
+          for i in {1..10}; do
+            if curl -fsS http://localhost:8080/health >/dev/null; then
+              exit 0
+            fi
+            sleep 1
+          done
+          docker logs sma-ci
+          exit 1
+
+      - name: Check version endpoint
+        run: |
+          curl -fsS http://localhost:8080/version | python3 - <<'PY'
+          import json,sys
+          data = json.load(sys.stdin)
+          assert "version" in data
+          assert "lastUpdate" in data
+          print("version ok")
+          PY
+
+      - name: Analyze sample metrics
+        run: |
+          curl -fsS -o /tmp/analysis.json -X POST \
+            -F "file=@testdata/fixtures/sample_metrics.txt" \
+            http://localhost:8080/api/analyze/both
+          python3 - <<'PY'
+          import json
+          with open("/tmp/analysis.json") as f:
+            data = json.load(f)
+          assert "console" in data
+          assert "markdown" in data
+          print("analysis ok")
+          PY
+
+      - name: Show container logs on failure
+        if: failure()
+        run: docker logs sma-ci
+
   container-image:
     runs-on: ubuntu-latest
     needs: build