Calls the runtime's private `nextEvent` directly (0 ms timeout, no
listener/connection open, so each round trip returns immediately with
status 0) 200,000 times after a warm-up, then asserts RSS growth
across the run stays under 5 MiB with `global.gc()` forced before and
after. The old per-call `koffi.alloc` code allocates a ~64 B event
struct plus a 4 B int32 every iteration and never frees either, so it
clears this bound by roughly 2x; the fixed code, which allocates
nothing per call, stays flat. Skips when no native bridge is built or
when Node wasn't started with `--expose-gc`; `npm test` now passes
`--expose-gc` so the check runs by default instead of always skipping.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
9a7e20a8d2