- Add config.py with dataclass-based configuration from env vars
- Remove hardcoded RunPod endpoint and credentials
- Consolidate duplicate training components into single reusable function
- Add .env.example with all configurable options
- Update README with environment variable documentation
- Add Kubernetes secrets example for production deployments
- Add timeout and error handling improvements
BREAKING: Pipeline parameters now use env vars by default.
Set RUNPOD_API_KEY, RUNPOD_ENDPOINT, S3_BUCKET, and AWS creds.
