Replace debug_assert!(status == 0) with proper error returns. Per the
USB/IP protocol spec, the status field in these requests is "unused,
shall be set to 0" — a non-zero value indicates a non-compliant client
and should be rejected at the parsing boundary.
Also document fuzzer crash triage guidelines in CLAUDE.md.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
