Fix code scanning alert no. 4: Information exposure through an exception

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

agents-api/agents_api/routers/healthz/check_health.py

@@ -3,7 +3,7 @@
 from ...autogen.openapi_model import Agent, ListResponse
 from ...models.agent.list_agents import list_agents as list_agents_query
 from .router import router
-
+import logging
 
 @router.get("/healthz", tags=["healthz"])
 async def check_health() -> dict:
@@ -13,6 +13,7 @@ async def check_health() -> dict:
             developer_id=UUID("00000000-0000-0000-0000-000000000000"),
         )
     except Exception as e:
-        return {"status": "error", "message": str(e)}
+        logging.error("An error occurred while checking health: %s", str(e))
+        return {"status": "error", "message": "An internal error has occurred."}
 
     return {"status": "ok"}