azure doesnt work

[cjellick]

See this internal slack thread: https://acorn-io.slack.com/archives/C03FU91U4SX/p1709309998579649

And this discord thread: https://discord.com/channels/1204558420984864829/1204558424734437438/1213154452744314890

And this hacky fix: #103

I don't like the hacky fix though. Seems brittle. Also, seems like a user should not need to set the --default-model flag if they are also setting these azure env vars

[sirredbeard]

See also #59 and #43

[keyallis]

Closing in favor of #43 for tracking purposes