[codex][mcp] Add resource uri meta to tool call item. (#17831)

- [x] Add resource uri meta to tool call item so that the app-server
client can start prefetching resources immediately without loading mcp
server status.

codex-rs/core/tests/suite/rmcp_client.rs

@@ -736,6 +736,7 @@ async fn stdio_image_responses_round_trip() -> anyhow::Result<()> {
                 tool: "image".to_string(),
                 arguments: Some(json!({})),
             },
+            mcp_app_resource_uri: None,
         },
     );