V8 Inspector capture counted an execution-context created or destroyed
event whose context ID was missing or not a safe integer as retained,
but recorded nothing about it. The capture counters claimed the event
was kept while the context list silently omitted it, and no unknown
identified the loss.
The producer that parses the event and owns the capture counters now
records an invalid-context count, mirroring the existing invalid-script
accounting. The projection reports a non-zero count as an explicit
unknown, so the retained count and the reported omission agree. No
context is invented from a malformed ID, and all-valid captures are
unchanged.
Fixes#4685
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
