feat(rag): 服务层接线（上传即索引 + use_rag 异步链路 + 强 e2e）

tests/test_server_service.py

@@ -7,6 +7,7 @@ from __future__ import annotations
 from pathlib import Path
 from types import SimpleNamespace
 
+import asyncio
 import pytest
 
 from genesis.server.store import SessionStore, ProjectsStore
@@ -248,7 +249,7 @@ def test_existing_system_zip_triggers_impact_flow(tmp_path):
     svc.confirm_parse(s.session_id)
     assert svc.get_session(s.session_id).status == "impact_running"
 
-    svc.run_impact(s.session_id)
+    asyncio.run(svc.run_impact(s.session_id))
     got = svc.get_session(s.session_id)
     assert got.status == "awaiting_impact_confirm"
     assert got.impact_summary
@@ -269,7 +270,7 @@ def test_impact_state_guard(svc):
     svc.confirm_parse(s.session_id)
     # 无既有系统 → writing，start-impact 应报错
     with pytest.raises(ServiceStepError):
-        svc.run_impact(s.session_id)
+        asyncio.run(svc.run_impact(s.session_id))
 
 
 def test_qa_requires_generated(svc):