perf(trie-router): improve performance (1.5x ~ 2.0x) (#4724)

* Update node.ts

* ci: apply automated fixes

* ci: apply automated fixes (attempt 2/3)

* test(trie-router): add test for Node constructor with method and handler

Covers the constructor branch where method and handler are provided,
improving patch coverage to 100% line/statement.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>