fix(inference): claim spool requests by rename before reading

Renaming request.json before reading it means a replacement written by
the host between read and delete is no longer lost. Malformed request
files now yield an invalid_request result instead of spinning.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
832d18f33eflamboh committed on 9/19/2026, 6:00:20 AMparent8947977
1 file changedLine totals unavailable