Gahow Wang
fe556b5d98
Honor incoming X-Request-Id so replayer metrics and proxy breakdown share a join key. Each route decision now captures session_id, the full per-worker candidate-score snapshot (ongoing/pending/num_requests /cached_blocks plus both linear and lmetric scores), the chosen score, and unix timestamps for first-token and done events. A separate _worker_state_log records one row per decision and is exposed via GET /worker_state; GET /worker_state/latest returns a live snapshot without recording it. Required by Batch 3 (session hot-spot proof) and Batch 5 (failure attribution); existing breakdown.json had no per-worker state at decision time. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>