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/plugins/builtins/calendar/models.py

@@ -6,6 +6,7 @@ import uuid
 from datetime import datetime
 from typing import Any
 
+from pgvector.sqlalchemy import Vector
 from sqlalchemy import (
     Boolean,
     DateTime,
@@ -13,14 +14,12 @@ from sqlalchemy import (
     Index,
     String,
 )
-from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.dialects.postgresql import JSONB, TSVECTOR
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
-from sqlalchemy.dialects.postgresql import TSVECTOR
-from pgvector.sqlalchemy import Vector
 
 
 class Calendar(Base, TenantMixin, OwnedMixin):