- Call initializeLibrary() (setupForeignThreadGc) in the `.ffi.` request
wrapper and in add/remove_event_listener so a foreign (Go) caller thread
has an initialised Nim heap before any allocation ($reqTypeName /
$eventName / registry ops). Without it such a thread segfaults in the
allocator under GC pressure — the production unwrap SIGSEGV.
- recycleContext resets the event registry/queue + stuck flag on park so a
reused pool slot starts clean.
- ffiDtor doc/cleanup for the async recycle ABI.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
