L10b Betrieb & Aufräumen: Lotse-Betrieb – Aufbewahrung KI-Protokoll und Token-Kontingent

Aufräumpunkt k (Spec §31):
- Aufbewahrung: services/lotse/retention.ts leert input/output und createdById von
  AiGeneration-Einträgen älter als AI_GENERATION_RETENTION_DAYS (Default 180), Metadaten bleiben,
  Audit je Mandant. Queue/Processor ai-retention, täglicher BullMQ-Job-Scheduler beim Start des
  craftvia-worker.
- Kontingent: services/lotse/budget.ts (Tokens ein+aus je Kalendermonat, TenantSettings-Wert vor
  Env AI_MONTHLY_TOKEN_LIMIT, 0 = unbegrenzt). Lotse-Entwurf und Sprachnotiz-Zusammenfassung
  → blocked budget_exceeded mit Klartext; Import-Extraktion fällt auf manuelle Erfassung zurück
  (Hinweis ai_budget_exceeded). /settings/lotse: Kontingent setzen, Verbrauch anzeigen.
- scripts/test-betrieb-audit.ts: Audit nach Commit/Rollback/verschachtelt, Merge atomar und in
  äußerer Transaktion, Audit „read", Aufbewahrung (Frist, Metadaten, Idempotenz, Mandant B),
  Kontingent (Mandant/Env/Vormonat/unbegrenzt, Rollen, Audit).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

messages/en/imports.json

@@ -170,7 +170,8 @@
       "email_invalid": "{field}: e-mail address format is invalid.",
       "phone_invalid": "{field}: phone number format is invalid.",
       "end_before_start": "{field}: end is before start.",
-      "manual_entry": "Automatic recognition is not available. Please enter manually."
+      "manual_entry": "Automatic recognition is not available. Please enter manually.",
+      "ai_budget_exceeded": "The monthly AI allowance is used up – therefore no automatic recognition."
     },
     "positions": {
       "name": "Description",

messages/en/lotse.json

@@ -76,7 +76,8 @@
     "no_transcript": "The voice note has no text yet.",
     "pending": "The transcription is still running.",
     "conflict": "Changed in the meantime. Please reload the page.",
-    "invalid": "Please check your input."
+    "invalid": "Please check your input.",
+    "budget_exceeded": "This business has used up its monthly AI allowance. Please write the report yourself or ask the office."
   },
   "settings": {
     "back": "Settings",
@@ -96,6 +97,11 @@
       "du": "Informal (du)"
     },
     "save": "Save",
+    "budget": "Monthly AI allowance (tokens)",
+    "budgetHint": "Empty = platform default ({platform}). 0 = unlimited. Once used up, Lotse prepares nothing until the end of the month.",
+    "budgetUnlimited": "unlimited",
+    "budgetUsage": "Used since {since}: {used} of {limit}",
+    "budgetExceeded": "Allowance used up",
     "dataTitle": "Which data goes where",
     "draftProvider": "Report draft and summary",
     "transcriptionProvider": "Voice note transcription",