fix: dispose native handles on audio/video stream EOS

[LautaroPetaccio]

Why

AudioStreamSource and VideoStreamSource create an FfiHandle for the native stream. On eos (end-of-stream), they removed the event listener and closed the controller but never called ffiHandle.dispose(). The handle was only disposed in the cancel() path. Streams that end normally (the common case) leaked the native handle.

Additionally, AudioStreamSource.cancel() did not close the frameProcessor, so cancelling a noise-cancelled audio stream leaked the processor resource.

How

• In the eos case of both AudioStreamSource.onEvent and VideoStreamSource.onEvent, add this.ffiHandle.dispose() after closing the controller. This makes the EOS path symmetric with the cancel() path.
• Add this.frameProcessor?.close() to AudioStreamSource.cancel() so both termination paths release the processor.

[changeset-bot]

🦋 Changeset detected

Latest commit: 670293c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@livekit/rtc-node	Patch

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[devin-ai-integration]

✅ Devin Review: No Issues Found

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