Delete row sig_7250dfd31051 from signals

id sig_7250dfd31051
event_id evt_b528afe4846a
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_453b8a424 ...
dedupe_key signal_enriched:discovery_unusual_volume_delta:83f ...
throttle_s 0
created_at 2026-04-18T18:48:29.555162+00:00
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