Separate load-failure metadata from the typed optional observation ports
and derive the process cleanup inventory from those ports. This includes
the JavaScript runtime owner and removes the separate four-provider list.
Preserve all load failures in server injection and keep shared providers
caller-owned across individual server closure. Retain failed close hooks
for retry while removing peers whose cleanup completed.
Validated with 19 focused lifecycle/isolation checks and a final rerun of
the new boundary regression, check, docs and exact test discovery. The
runner test uses real idle providers with controlled SDK/shutdown handles
and a close rejection; active Inspector resource consequences, native
Linux/Windows and end-to-end stdio shutdown remain unverified.
Fixes#5222
morluto
00dd959b82