Use clients error type when figuring out the errors.

Implemented improved error handling using OpenAI client's built-in error type detection. The patch maps specific OpenAI error types
(insufficient_quota, billing_not_active, rate_limit_exceeded) to appropriate AI module exceptions while maintaining backward compatibility
with legacy string matching. Ready for review and testing.

ishani patel → made their first commit to this issue’s fork.

I've raised MR from the patch.
Please review.
THank you!