Sub-project B increment 0: stand up Dagster on the cluster + migrate the combined-book
paper-forward track end-to-end as an asset graph reading the warehouse SSOT (proves A->B),
replacing the fxhnt-forward cron. CombinedBookSource port (Warehouse/Raw), 4 assets,
cockpit ingest, reversible cutover. B1-B4 (other tracks, gauntlet, promote/live) deferred.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
9878207ecd