Delete row sig_47a75e188be2 from signals

id sig_47a75e188be2
event_id evt_228bd115d582
watcher_id NULL
signal_type discovery_unusual_volume_delta
value {"aggregator_url":"https://www.nasdaq. ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_e4b8d0dc4 ...
dedupe_key signal_enriched:discovery_unusual_volume_delta:449 ...
throttle_s 0
created_at 2026-04-08T22:43:46.053448+00:00
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