test(ptc): migrate remaining inspection consumers

scripts/smoke-python-runtime.py

@@ -536,7 +536,7 @@ def completion_chunks(body: dict[str, object]) -> list[dict[str, object]]:
         return tool_call_chunks(
             "call-code-worker",
             "run_code",
-            {"code": "return 6 * 7", "description": "Compute the smoke value"},
+            {"code": "Harness.inspect(6 * 7)", "description": "Compute the smoke value"},
         )
     if prompt == WORKFLOW_PROMPT:
         assert_advertised_tool(body, "workflow")