W-23459244 fix(node-binding): resolve teardown crash, streaming race, and swallowed read errors

[mlischetti]

Extracted from #119 so the fixes to the pre-existing Node binding can be reviewed and merged independently of the new C/Go/Rust bindings.

Changes

native-lib/node/src/addon.c

• Teardown crash: graal_tear_down_isolate() must be called on a thread attached to the isolate. The bootstrap thread created by graal_create_isolate() is joined and exits, so its IsolateThread is invalid at cleanup
  — passing it faults, and leaving it attached blocks teardown forever waiting for a dead thread to reach a safepoint. Now the bootstrap thread is detached after create, and the cleanup thread attaches to the isolate to obtain
  a valid local IsolateThread before tearing down.
• Swallowed read errors: when the JS read callback throws, surface the pending exception (message + stack) to stderr and signal an error (bytes_read = -1) instead of silently clearing it and reporting 0 bytes.

native-lib/node/src/index.ts

• Streaming race: replace the single resolveChunk slot with a pendingResolves queue so every waiting consumer is woken (the single slot dropped all but the last waiter); metadata resolution drains the whole queue.
  • Memory: release consumed pre-buffered input buffers so memory is freed as async input is drained.

Notes

• Branches off master; touches only the pre-existing Node binding — no dependency on the new bindings in Native-bindings #119.
• Repro/regression tests intentionally left in Native-bindings #119 per the extraction scope (source fixes only).