Hook registers a 15-minute schedule that starts/resumes the backfill only inside the maintenance window (no external cron or token). The backfill pauses when the window closes and resumes next night. UI shows paused state and last-run errors.
Bundle extension (upload hook + API endpoint + admin module) that warms Directus image transform cache in-process with an explicit acceptFormat, so the generated file matches the browser's cache key byte-for-byte. - resumable, window-aware backfill with progress + cancel - system + custom presets, effective-format reporting, shadow warnings - storage breakdown (previews vs originals), human-readable API fields - diagnostics: resolve-plan prediction, per-file generate, ops ring buffer - isolated dev/staging compose stack + deploy/rollback scripts Verified on Directus 11.17.4: 40/40 tests, hash-match gate passed, idempotent backfill, custom fixed-format presets, error surfacing.
