feat: setup a basic vercel sdk instrumentation

[Granipouss]

See tests for usage examples.

For now it just create generations with metrics, inputs and outputs.

TODO (maybe not all now)

• Handle steps/threads passed as arguments when using generateText or streamText
• Add tests with another provider (anthropics ?)
• Add tests with structured generation
• Add tests with images
• Add tests with tool calls (it seems there are no functions in vercel sdk)
• Find a non-chat completion and add tests with it

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This change is 

[clementsirieix]

The vercel sdk is adding a lot of dependencies, have we checked the size of the build?

Reviewed 4 of 6 files at r1, all commit messages.
Reviewable status: 4 of 6 files reviewed, 2 unresolved discussions (waiting on @Granipouss and @willydouhard)

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src/instrumentation/vercel-sdk.ts line 64 at r1 (raw file):

  delete settings.prompt;
  delete settings.abortSignal;
  return settings;

Won't it work to simply use omit(settings, ["model", "prompt", "abortSignal"])?
Also in that case we probably do not need this method for that purpose.

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src/instrumentation/vercel-sdk.ts line 123 at r1 (raw file):

      ttFirstToken = Date.now() - startTime;
    }
    outputTokenCount += 1;

Question: I thought a chunk is not strictly equal to a single token?

[Granipouss]

The dependencies are added as peerDeps and devDeps so it shouldn't impact the final build

[Granipouss]

src/instrumentation/vercel-sdk.ts line 64 at r1 (raw file):

Previously, clementsirieix (Clément Sirieix) wrote…

Won't it work to simply use omit(settings, ["model", "prompt", "abortSignal"])?
Also in that case we probably do not need this method for that purpose.

Like lodash omit? DO we have an helper for it ?

[Granipouss]

src/instrumentation/vercel-sdk.ts line 123 at r1 (raw file):

Previously, clementsirieix (Clément Sirieix) wrote…

Question: I thought a chunk is not strictly equal to a single token?

No idea, I just took the logic from the openAI instrument

[clementsirieix]

Reviewed 2 of 6 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Granipouss)