- Deleted the `/examples/docker/python-app` directory and associated files.
- Integrated a custom `header-echo` server for Kubernetes and Docker Compose tests.
- Updated Kubernetes and Docker Compose configurations to use the new `header-echo-server:test` image.
- Enhanced Kubernetes integration tests to validate JSON responses and Cloudflare IP translation behavior.
- Adjusted Compose files to build images locally instead of pulling.
- Simplified examples by removing `/etc/hosts` entry instructions.
- Enhanced `cloudflare.py` plugin with a configurable log format.
- Improved `generate-keys.sh` for portability using `$SCRIPT_DIR`.
- Added end-to-end tests for Compose examples using pytest.