health check: the last six producers carry their dashboard sentence (R-79 option A, D3)

Docker unreachable, protected container down, and the four storage-path entries now carry a
bundle key beside their wire text; the wire text is unchanged byte for byte. Hungarian values of
the four storage keys equal the frozen formats (i18n_go_parity). Red-proven: a zero MsgRef on the
unavailable-path warning fails TestR79_RemainingProducersCarryTheirDashboardSentence and
TestR79_HealthBannersFollowTheHousehold (producer-driven, English household sees Hungarian).

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

@@ -1571,6 +1571,12 @@
   "health.memory_high": "Memory usage high: %.0f%%",
   "health.cpu_high": "CPU usage high: %.0f%%",
   "health.temperature_high": "Temperature high: %.0f°C (%s)",
+  "health.docker_unreachable": "Docker is not reachable: %s",
+  "health.protected_container_down": "A protected system service is not running: %s",
+  "health.storage_unavailable": "Storage not reachable: %s",
+  "health.storage_not_separate": "The storage (%s) is not on a separate drive — data is written to the system drive",
+  "health.storage_usage_high": "Storage usage high: %s (%.0f%%)",
+  "health.storage_almost_full": "Storage almost full: %s (%.0f%%)",
   "hold.copy_holds.db_only": "holds only the settings and the database, not the files",
   "hold.copy_holds.files": "holds the settings, the database and the files",
   "hold.copy_holds.volumes": "holds the settings, the database and the data volumes",