Add integration testing infrastructure with Podman Compose

- Add docker/podman-compose.yml for Immich server (no ML)
- Add test-data/sample-photos/ with 3 public domain images
- Add scripts/start-immich.sh for container startup + admin/API key creation
- Add scripts/seed-data.sh for uploading test photos and creating albums
- Add scripts/stop-immich.sh for cleanup with volume destruction
- Add scripts/run-example.sh wrapper (fixed env var export)
- Update examples to use IMMICH_URL and IMMICH_API_KEY env vars
- Add .github/workflows/integration-test.yml for CI
- Update assets.list() to use /search/metadata endpoint
- Update AGENTS.md with example running instructions
- Add 5 new examples: search_metadata, album_management, timeline_browsing,
  delete_assets, server_info

.github/workflows/integration-test.yml

@@ -0,0 +1,51 @@
+name: Integration Tests
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+jobs:
+  integration-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-action@stable
+
+      - name: Install Podman
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y podman
+          sudo systemctl enable --now podman.socket
+
+      - name: Install podman-compose
+        run: |
+          sudo pip3 install podman-compose
+
+      - name: Start Immich
+        run: |
+          ./scripts/start-immich.sh
+
+      - name: Seed test data
+        run: |
+          ./scripts/seed-data.sh
+
+      - name: Run tests
+        run: |
+          source .env.test
+          cargo test
+
+      - name: Run examples
+        run: |
+          source .env.test
+          cargo run --example basic_usage
+
+      - name: Cleanup
+        if: always()
+        run: |
+          ./scripts/stop-immich.sh