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/workflows/step_handlers.py

@@ -14,7 +14,6 @@ import uuid
 from datetime import UTC, datetime, timedelta
 from typing import Any
 
-from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.models.workflow import WorkflowInstance
@@ -45,7 +44,8 @@ class StepResult:
         self.abort = abort
 
 
-type StepHandler = Any  # Callable[..., Awaitable[StepResult]]
+# Callable[..., Awaitable[StepResult]] — classic alias for py3.11 compat
+StepHandler = Any
 
 
 # ─── Registry ────────────────────────────────────────────────────────────────
@@ -534,6 +534,7 @@ async def _handle_webhook(
         return StepResult(error=f"URL blocked by SSRF protection: {url}", abort=True)
 
     import json
+
     import httpx
 
     try: