fix(services): make RagService protocol sync + fix no-op isinstance assertion

src/genesis/services/rag_service.py

@@ -7,8 +7,8 @@ from typing import Protocol, runtime_checkable
 
 @runtime_checkable
 class RagService(Protocol):
-    async def retrieve_write_rules(self, chapter_id: str) -> list[str]: ...
-    async def retrieve_design_rules(self, chapter_id: str) -> list[str]: ...
+    def retrieve_write_rules(self, chapter_id: str) -> list[str]: ...
+    def retrieve_design_rules(self, chapter_id: str) -> list[str]: ...
 
 
 class CannedRagService:

tests/test_phase5_rag.py

@@ -11,4 +11,4 @@ def test_canned_rag_returns_rules():
 
 
 def test_rag_service_is_protocol():
-    assert isinstance(CannedRagService("samples"), RagService) or True
+    assert isinstance(CannedRagService("samples"), RagService)