Delete row sig_84afc4e4e9ef from signals

id sig_84afc4e4e9ef
event_id evt_2919b0f6e609
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_8d2817f53 ...
dedupe_key signal_enriched:discovery_unusual_volume_delta:a77 ...
throttle_s 0
created_at 2026-04-21T10:45:03.231354+00:00
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