warehouse-key-and-load-guard

Load for warehouse/ETL tasks: dbt incremental models (lookback, unique_key, Airflow retries), INSERT loads, queries joining a Snowflake/BigQuery/Redshift/Databricks table with a declared PRIMARY KEY (Fivetran/Airbyte dims), adding RELY constraints, watermark syncs on updated_at/last_modified, and Kafka/ksqlDB/Spark window counts landed by a JDBC or Delta sink.