Fix memory leak issue by adding fetch request timeout

This commit resolves a memory leak issue that was occurring due to fetch requests hanging indefinitely. A timeout has been introduced to the `requestOpenai` function which ensures that these requests are aborted after a set period of time (currently 10 minutes). Additionally, error handling has been added to catch and log `AbortError` when a fetch request is aborted. This fix significantly improves the stability and reliability of the application by preventing memory leaks related to unresolved fetch requests.