chore: import upstream snapshot with attribution

.github/workflows/ci-postgres-client-tests.yaml

@@ -0,0 +1,30 @@
+name: Test PostgreSQL Client integrations
+on: [pull_request]
+
+concurrency:
+  group: ci-postgres-client-tests-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  postgres_client_integrations_job:
+    runs-on: ubuntu-22.04
+    timeout-minutes: 45
+    name: Run tests
+    steps:
+      - name: Free disk space
+        run: |
+          NAME="DISK-CLEANUP"
+          echo "[${NAME}] Starting background cleanup..."
+          [ -d "$AGENT_TOOLSDIRECTORY" ] && sudo rm -rf "$AGENT_TOOLSDIRECTORY" &
+          [ -d /usr/share/dotnet ] && sudo rm -rf /usr/share/dotnet &
+          [ -d /usr/local/lib/android ] && sudo rm -rf /usr/local/lib/android &
+          [ -d /opt/ghc ] && sudo rm -rf /opt/ghc &
+          [ -d /usr/local/share/boost ] && sudo rm -rf /usr/local/share/boost &
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Set up Docker
+        uses: docker/setup-docker-action@v4
+      - name: Build Docker image
+        run: docker build -t postgres-client-tests --file testing/postgres-client-tests/Dockerfile .
+      - name: Run tests
+        run: docker run --detach=false postgres-client-tests