fix: node fetch timeout

[vachmara]

Fix #712

This pull request updates how the undici HTTP client library is managed and integrated in the project, moving it from a direct dependency to a peer dependency, and adds improved Node.js HTTP timeout handling using undici's Agent. It also introduces corresponding test coverage for this new behavior.

Dependency management:

• Put undici and undici-types to peerDependencies in package.json, and marked them as optional in peerDependenciesMeta. This makes them optional peer dependencies instead of always-installed direct dependencies.

Node.js HTTP request improvements:

• In src/_api_client.ts, updated the request logic to dynamically import undici and set a custom Agent with timeout options for Node.js environments, improving HTTP timeout handling.

Testing:

• Added a new unit test in test/unit/api_client_test.ts to verify that the dispatcher with timeouts is set on HTTP requests in Node.js, and imported the required Agent and types from undici for testing.

Shout out to @yulisunny for spotting the issue, I tested this on vercel it's working!

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[shmishra99]

@vachmara, Thank you for raising this PR. I have created an internal bug for the review.

[hkt74]

Thanks for resolve the last comments quickly, I did a second review using Gemini

[vachmara]

Thanks for resolve the last comments quickly, I did a second review using Gemini

Perfect, thank you! Let me know if you need anything else

[hkt74]

I did more tests locally with your change and triggered the github actions

1. Need to add 'undici' in rollup.config.mjs - externalDeps
2. fix the github actions

[vachmara]

Not sure the coverage CI is related to this change, is everything still okay?

[hkt74]

could the coverage CI related to the change in the package.json file?

/home/runner/work/js-genai/js-genai/dist/src/cross/sentencepiece/sentencepiece_model.pb.js

[vachmara]

I’ve fixed the test and the discrepancies you flagged, but I still can’t get the coverage CI to run properly

[hkt74]

@vachmara I will take a look coverage test

[hkt74]

looks like the coverage test is failing for other pr as well, I think we can skip it for now

[vachmara]

Perfect, thanks for addressing this!

[vachmara]

Hey @shmishra99 @hkt74,
Any updates on this PR? Do you have an idea of when it might be merged?