Yup. I'm not sure I've perfectly figured out where to draw the line, but a 500 error should mean a 3rd party proxy failed to get a response from your server - n

Yup. I'm not sure I've perfectly figured out where to draw the line, but a 500 error should mean a 3rd party proxy failed to get a response from your server - not that you caught an exception in the server and specifically crafted an internal server error response. Should you start HTTP responses with "ACK" because it's based on TCP? No. Then why start your HTTP responses with "HTTP/2 500" because your call to OpenAI timed out?