feat: add replay button on completed jobs in the jobs table

Shows a "Replay" button on non-active jobs that re-creates a new job
of the same type and library. Supports all replayable job types:
rebuild, full_rebuild, rescan, scan, thumbnail_rebuild,
thumbnail_regenerate, metadata_batch, metadata_refresh.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/backoffice/lib/i18n/en.ts

@@ -282,6 +282,7 @@ const en: Record<TranslationKey, string> = {
   "jobRow.metadataLinks": "{{count}} links analyzed",
   "jobRow.errors": "{{count}} errors",
   "jobRow.view": "View",
+  "jobRow.replay": "Replay",
 
   // Job progress
   "jobProgress.loadingProgress": "Loading progress...",