- Limited PromEx.Oban plugin to run every 60 seconds on worker machines only, reducing DB load from frequent full table scans.
- Added a composite (worker, id) index to oban_jobs to speed up recent executions queries.
- Replaced the oversized GIN args index with a jsonb_path_ops version, made Oban user own the table, and increased reindex timeout, shrinking index size from 460 GB to ~2 GB.