Delete row sig_a2329f7688aa from signals

id sig_a2329f7688aa
event_id evt_bc59563a9926
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_da281e243 ...
dedupe_key signal_enriched:discovery_unusual_volume_delta:c94 ...
throttle_s 0
created_at 2026-04-10T08:08:24.084182+00:00
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