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

test-data/sample-photos/README.md

@@ -0,0 +1,37 @@
+# Sample Photos
+
+This directory contains sample photos for testing the Immich SDK.
+
+## Photos
+
+### photo1.jpg
+- **Source**: Unsplash
+- **Photographer**: [Yannick Pulver](https://unsplash.com/@yanu)
+- **URL**: https://unsplash.com/photos/photo-1506905925346-21bda4d32df4
+- **License**: Unsplash License (Free to use)
+- **Description**: Swiss Alps mountain landscape
+
+### photo2.jpg
+- **Source**: Unsplash
+- **Photographer**: [Manja Vitolic](https://unsplash.com/@madhatterzone)
+- **URL**: https://unsplash.com/photos/photo-1514888286974-6c03e2ca1dba
+- **License**: Unsplash License (Free to use)
+- **Description**: Cat portrait
+
+### photo3.jpg
+- **Source**: Unsplash
+- **Photographer**: [Pedro Lastra](https://unsplash.com/@peterlaster)
+- **URL**: https://unsplash.com/photos/photo-1477959858617-67f85cf4f1df
+- **License**: Unsplash License (Free to use)
+- **Description**: Chicago cityscape aerial view
+
+## License Information
+
+All photos sourced from Unsplash are available under the [Unsplash License](https://unsplash.com/license):
+- Free to use for commercial and non-commercial purposes
+- No permission needed (though attribution is appreciated)
+- Cannot be sold without significant modification
+
+## Usage
+
+These photos are intended for development and testing purposes only.