Improve withTrim callback wrappers

[tinyyyyyyyyyyO]

Summary

• cache withTrim wrappers for identical callback/options so repeated calls return the same function
• preserve client callback metadata on wrappers so callback registries can add, remove, call, and free them safely
• add a regression test covering ClientCallbackSet.add(withTrim(cb)) followed by remove(withTrim(cb))

Tests

• npm run --prefix server dev:fastbuild
• npx jest --runInBand --testNamePattern="withTrim should return stable wrappers" tests/clientServer/runtime-typechecking.test.js

[opirebot]

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