Delete row sig_44b4413863a5 from signals

id sig_44b4413863a5
event_id evt_532b4d0e8c69
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_8ab3def10 ...
dedupe_key signal_enriched:discovery_unusual_volume_delta:d0a ...
throttle_s 0
created_at 2026-04-18T06:07:41.924529+00:00
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