v0.1.9

Fixed

• Backfill recovery when the scheduled mdf_backfill_batch single cron event
  is lost to a race with another scheduler (observed in production with Action
  Scheduler). mdf_start_backfill() now verifies the event persisted after
  scheduling and retries once, and a self-heal check re-schedules the batch
  whenever the queue still has work but no batch event is pending (runs on the
  existing purge cron and on admin page loads — no new cron schedule).
  Previously the backfill could stall indefinitely with a populated queue and
  no scheduled event, requiring a manual Settings-toggle re-trigger.
• Per-post markdown rebuilds (mdf_markdown_rebuild, queued on save_post
  when edited content changes) get the same protection: scheduling now verifies
  the single event persisted and retries once, records a lightweight per-post
  pending marker, and the self-heal check re-schedules any stale pending
  rebuild whose event was lost to the same cron write race.

Added

• Persistent markdown-coverage status line on the Settings page, shown whenever
  "Offer markdown to agents" is enabled: while a backfill runs it keeps the
  existing in-progress counter; once complete it shows "N of M published
  posts/pages have a cached markdown version." (live count of cached .md
  files vs. published content eligible for conversion), or "No published
  content yet to convert." on an empty site. Hidden when the toggle is off.