The connectors::list_connectors async future exceeds rustc's default query
depth of 128. Match the limit already used by codex-app-server.

--- a/chatgpt/src/lib.rs
+++ b/chatgpt/src/lib.rs
@@ -1,4 +1,6 @@
+#![recursion_limit = "256"]
+
 pub mod apply_command;
 mod chatgpt_client;
 pub mod connectors;
 pub mod get_task;