Use production Deepgram for WS transcription

[mlodato517]

This Commit

Updates the repo to use the official production Deepgram endpoint for WS transcription instead of the proxy.

Why?

Because that is more correct and stable. Then we can take down the proxy and stop managing it.

Notes

This requires those building the repo to compile a token into the binary which will be available on the client. We think this is fine for now and can come up with something else if we want later.

[nikolawhallon]

Merge it! Merge it! Merge it! Merge it!

[mlodato517]

I'll squash and merge and apologies if you didn't want that newer change - I'll update it in a follow up if you want me to!