Carbon-aware scheduler for batch ETL jobs (Python)

Nice, practical riff on the GreenOps idea: a scheduler that polls real-time grid APIs and will defer jobs while still enforcing hard SLAs is the useful bit, and the Snowflake gCO2 estimator gives a concrete hook for CI checks. Repo is clearly an early reference implementation (single commit, few files) — useful as a starting point but it needs more integration examples (Airflow operator, metrics, retries) and validation to move from experiment to something I'd drop into production.