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/knowledge/jobs.py

@@ -25,7 +25,8 @@ async def cleanup_knowledge_job(ctx: dict[str, Any]) -> None:
     Runs daily. Keeps approved extractions indefinitely.
     Iterates per-tenant for RLS compliance.
     """
-    from sqlalchemy import text as sa_text, delete as sa_delete
+    from sqlalchemy import delete as sa_delete
+    from sqlalchemy import text as sa_text
 
     from app.core.db import get_worker_session_factory
 

app/plugins/builtins/knowledge/models.py

@@ -1,12 +1,17 @@
 """Knowledge extraction models — tracks LLM extractions and review queue."""
 from __future__ import annotations
+
 import uuid
 from datetime import datetime
-from sqlalchemy import DateTime, Float, ForeignKey, Index, Integer, String, Text, func
-from sqlalchemy.dialects.postgresql import JSONB, UUID as PGUUID
+
+from sqlalchemy import DateTime, Float, ForeignKey, Index, String, Text, func
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
+
 from app.core.db import Base, TenantMixin
 
+
 class KnowledgeExtraction(Base, TenantMixin):
     """Tracks a single knowledge extraction run from a source (wiki, dms, mail, comm)."""
     __tablename__ = "knowledge_extractions"

app/plugins/builtins/knowledge/plugin.py

@@ -1,8 +1,10 @@
 """Knowledge plugin — LLM-based entity/relationship extraction, ask-knowledge, review queue."""
 from __future__ import annotations
+
 import logging
 import uuid
 from typing import Any
+
 from app.plugins.base import BasePlugin
 from app.plugins.manifest import PluginManifest, PluginRouteDef
 
@@ -78,8 +80,8 @@ class KnowledgePlugin(BasePlugin):
 
         async def _ask_knowledge_handler(arguments: dict[str, Any], context: dict[str, Any]) -> dict[str, Any]:
             """Ask a knowledge question."""
-            from app.plugins.builtins.knowledge.services import ask_knowledge
             from app.core.db import get_worker_session_factory
+            from app.plugins.builtins.knowledge.services import ask_knowledge
             question = arguments.get("question", "")
             tenant_id = context.get("tenant_id")
             if not question or not tenant_id:
@@ -107,8 +109,8 @@ class KnowledgePlugin(BasePlugin):
 
         async def _search_knowledge_handler(arguments: dict[str, Any], context: dict[str, Any]) -> dict[str, Any]:
             """Search wiki articles via unified search."""
-            from app.plugins.builtins.unified_search.provider_registry import get_search_registry
             from app.core.db import get_worker_session_factory
+            from app.plugins.builtins.unified_search.provider_registry import get_search_registry
             query = arguments.get("query", "")
             tenant_id = context.get("tenant_id")
             if not query or not tenant_id:

app/plugins/builtins/knowledge/services.py

@@ -1,10 +1,13 @@
 """Knowledge extraction services — LLM-based entity/relationship extraction."""
 from __future__ import annotations
+
 import logging
 import uuid
 from typing import Any
-from sqlalchemy import select, update
+
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
+
 from app.ai.llm_client import llm_complete
 from app.plugins.builtins.knowledge.models import KnowledgeExtraction