Module errors 

Maps HTTP status codes and OpenAI error bodies to tt_shared::ProviderError.

OpenAI error body shape:

{ "error": { "message": "...", "type": "...", "code": "...", "param": null } }

Functions

map_reqwest_error

Map a reqwest::Error (network-level failure) to ProviderError.

map_response_error

Map an OpenAI HTTP status + raw body text into a ProviderError.