Testing Dags

This handles the full test-debug-fix loop for Airflow DAGs when you need more than a simple test run. The approach is refreshingly direct: just trigger the DAG first with `af runs trigger-wait`, then debug only if it fails. No pre-flight checks, no validation theater. When things break, `af runs diagnose` gives you the full picture in one call, and `af tasks logs` gets you the actual error messages. It's built for iterative workflows where you're bouncing between code changes and test runs until the pipeline works. The workflow diagrams and phase breakdown make it easy to figure out which command you actually need instead of guessing.