feat(governance): process hermes km healthchecks

apps/api/src/main.py

@@ -668,6 +668,16 @@ async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
     except Exception as e:
         logger.warning("governance_dispatcher_schedule_failed", error=str(e))
 
+    # T90 2026-05-19 ogt + Codex: Hermes KB growth worker（每 5 分鐘）
+    # 消費 knowledge_degradation 的 hermes_kb_growth_healthcheck dispatch，
+    # 只產生 REVIEW 草稿並停在 owner review，不直接批准或發布 KM。
+    try:
+        from src.jobs.hermes_kb_growth_worker import run_hermes_kb_growth_loop
+        asyncio.create_task(run_hermes_kb_growth_loop())
+        logger.info("hermes_kb_growth_worker_scheduled", interval_sec=300)
+    except Exception as e:
+        logger.warning("hermes_kb_growth_worker_schedule_failed", error=str(e))
+
     # 2026-04-25 P1.2 by Claude Engineer-A2 — failover 整合到 ai_router + lifespan
     # OllamaFailoverManager + OllamaAutoRecoveryService 飛輪接線：
     #   failover 切換時 → recovery_callback → set_current_primary → Redis 持久化