Delete row sig_528f7e281bb5 from signals

id sig_528f7e281bb5
event_id evt_9bd9d2fd3dbd
watcher_id NULL
signal_type opportunity_artifact
value {"artifact_id":"artf_thesis_2af468475f ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity
reason_trace {"_evidence_event_ids":["evt_dd7f5b705 ...
dedupe_key opportunity_artifact:artf_thesis_2af468475f6768d3
throttle_s 0
created_at 2026-04-16T20:11:42.603169+00:00
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