ci: add integration test workflow

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: AchoArnold

.github/workflows/integration-test.yml

@@ -0,0 +1,52 @@
+name: integration-test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  integration-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+
+      - name: Load Firebase credentials
+        run: |
+          echo "FIREBASE_CREDENTIALS=$(jq -c . tests/firebase-credentials.json)" >> $GITHUB_ENV
+
+      - name: Start services 🐳
+        working-directory: ./tests
+        run: docker compose up -d --build --wait
+
+      - name: Wait for seed to complete
+        working-directory: ./tests
+        run: |
+          echo "Waiting for seed container to finish..."
+          docker compose wait seed || true
+          sleep 2
+
+      - name: Run integration tests 🧪
+        working-directory: ./tests
+        run: go test -v -timeout 120s ./...
+
+      - name: Collect logs on failure 📋
+        if: failure()
+        working-directory: ./tests
+        run: |
+          docker compose logs api
+          docker compose logs emulator
+
+      - name: Stop services 🛑
+        if: always()
+        working-directory: ./tests
+        run: docker compose down -v