next.js

def0e3aa - fix: use Buffer.indexOf in uint8array helpers for faster byte scanning (3/8) (#89864)

fix: use Buffer.indexOf in uint8array helpers for faster byte scanning (3/8) (#89864) ## Summary Use `Buffer.indexOf` when available in `uint8array-helpers.ts` for faster byte sequence scanning. Falls back to the existing manual loop on non-Node environments. ## Test plan - [ ] `pnpm test-unit test/unit/stream-utils/uint8array-helpers.test.ts` passes