Delete row sig_95430656e224 from signals

id sig_95430656e224
event_id evt_30a274d2deb4
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_88ec7682f ...
dedupe_key signal_enriched:discovery_unusual_volume_delta:9c5 ...
throttle_s 0
created_at 2026-04-13T10:26:04.867531+00:00
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