fix(e7): CI-Gate-Vorbereitung — ruff über app/ von 105 auf 0 Findings bereinigt; 8 echte F821-NameError-Produktionsbugs behoben (external_api stream_chat-Call-Signatur an stream_chat_comm angepasst, agent_runner uuid vor lokalem Import, automation/plugin UserTenant-Import, tasks delete-audit user_id, workflows/engine timedelta, unified_search/contracts Any); py311-kompatibles StepHandler-Alias statt type-Statement; E402/F841 bereinigt; Verifikation 85/89 grün (4 Failures = bekannter Vorbestand BUG-099)

app/core/worker.py

@@ -345,9 +345,11 @@ async def cleanup_audit_log_job(ctx: dict[str, Any]) -> None:
     Runs daily to prevent the audit_log table from growing indefinitely.
     Iterates per-tenant for RLS compliance.
     """
-    from sqlalchemy import text as sa_text, delete as sa_delete
     from datetime import UTC, datetime, timedelta
 
+    from sqlalchemy import delete as sa_delete
+    from sqlalchemy import text as sa_text
+
     from app.core.db import get_worker_session_factory
     from app.models.audit import AuditLog
 
@@ -388,9 +390,11 @@ async def cleanup_trash_job(ctx: dict[str, Any]) -> None:
     Runs daily to clean up the trash. Iterates per-tenant for RLS compliance.
     Default retention: 90 days in trash before permanent deletion.
     """
-    from sqlalchemy import text as sa_text, delete as sa_delete
     from datetime import UTC, datetime, timedelta
 
+    from sqlalchemy import delete as sa_delete
+    from sqlalchemy import text as sa_text
+
     from app.core.db import get_worker_session_factory
     from app.models.contact import Contact
     from app.models.entity_attachment import EntityAttachment