R-585 (part): three producers follow the household's language

db_dump_failed, the off-box backup_failed and offbox_enlarge_blocked
(whose sentence IS the household's mail - no hub customerMessages entry)
now take facts and push a bundle key, so an English household reads
English. Hungarian bytes unchanged (go-parity). Added to
convertedProducers.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/i18n/locales/en.json

@@ -1430,6 +1430,9 @@
   "event.crossdrive_completed": "Second backup copy finished: %s",
   "event.crossdrive_failed": "Second backup copy failed: %s",
   "event.db_dump_completed": "Database backup finished",
+  "event.db_dump_failed": "Database backup failed",
+  "event.offbox_backup_failed": "Off-box (NAS) backup failed",
+  "event.offbox_enlarge_blocked": "The full remote backup of %s (~%s) would go over the storage quota (%d/%d GB). The configuration and the database are still backed up; contact us for a larger quota.",
   "event.disaster_recovery_completed": "Disaster recovery finished (%d succeeded, %d failed)",
   "event.disaster_recovery_started": "Disaster recovery started (%d app(s))",
   "event.health_critical": "System health is critical (was: %s)",

controller/internal/i18n/locales/hu.json

@@ -1421,6 +1421,9 @@
   "event.crossdrive_completed": "Másodlagos mentés elkészült: %s",
   "event.crossdrive_failed": "Másodlagos mentés sikertelen: %s",
   "event.db_dump_completed": "Adatbázis mentés elkészült",
+  "event.db_dump_failed": "Adatbázis mentés sikertelen",
+  "event.offbox_backup_failed": "Off-box (NAS) mentés sikertelen",
+  "event.offbox_enlarge_blocked": "A(z) %s teljes távoli mentése (~%s) túllépné a tárhelykeretet (%d/%d GB). A konfiguráció és az adatbázis továbbra is mentésre kerül; nagyobb kerethez vedd fel velünk a kapcsolatot.",
   "event.disaster_recovery_completed": "Katasztrófa helyreállítás befejezve (%d sikeres, %d sikertelen)",
   "event.disaster_recovery_started": "Katasztrófa helyreállítás elindítva (%d alkalmazás)",
   "event.health_critical": "Rendszer állapot kritikus (volt: %s)",