feat: add pr test workflow

.gitea/workflows/test_pr.yml

@@ -0,0 +1,52 @@
+name: PR tests
+
+on:
+  pull_request:
+    types: [opened, synchronize, edited, reopened]
+
+jobs:
+  build-and-smoke:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build image
+        run: |
+          docker build -t semapform-api:test-pr .
+
+      - name: Start container (background)
+        run: |
+          docker run -d --name semapform-test -p 8001:8001 semapform-api:test-pr sleep infinity
+
+      - name: Verify python module imports
+        run: |
+          docker exec semapform-test python -c "import api_service; print('import ok')"
+
+      - name: Start server in container and smoke test HTTP
+        env:
+          PORT: 8001
+        run: |
+          # start uvicorn inside the container (background)
+          docker exec -d semapform-test uv run uvicorn api_service:app --host 0.0.0.0 --port $PORT
+
+          # wait for up to 20s for the server to respond
+          SECONDS=0
+          until curl -sS "http://localhost:${PORT}/" -o /dev/null; do
+            sleep 1
+            SECONDS=$((SECONDS+1))
+            if [ $SECONDS -ge 20 ]; then
+              echo "server failed to respond within timeout" >&2
+              docker logs semapform-test || true
+              exit 1
+            fi
+          done
+
+      - name: Cleanup container
+        if: always()
+        run: |
+          docker rm -f semapform-test || true