fix(inference): supersede stale assembly results and widen Jev retry

A replacement request arriving during assembly (which has no progress
callbacks) now yields analysis_cancelled instead of a stale success.
The Jev planner leans on the SDK retry policy for one retry covering
timeouts, connection failures, 408, 429, and 5xx.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
7a0475e62eflamboh committed on 9/19/2026, 4:42:59 AMparenta7b27c5
3 files changedLine totals unavailable