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!

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[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!