Enable passing through Req opts?

[cigrainger]

We have a need for ipv6 (fly.io flycast) to connect to ollama. Would you be up for a PR that allows passing through Req options to the adapter? (Much like how Req itself allows passing connect_options through to Finch). request_options on the chat_completion config should do it.

[thmsmlr]

Yup sounds reasonable

[cigrainger]

I actually think this might just be a documentation fix -- seems like http_options can be passed through and override the config? I'll check it out.

[thbar]

Just wanted to chime in to remind/state that Req has some built-in testing facilities over there: https://hexdocs.pm/req/Req.Test.html#module-example (in addition to other possibilities for testing).

It would be great to ensure that someone writing test against instructor_ex can stub Req via the permitted options (although one can also "Mox" above instructor_ex too).