Delete row sig_c1921e1f8095 from signals

id sig_c1921e1f8095
event_id evt_0e582c262752
watcher_id NULL
signal_type discovery_ipo_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_0b16f6aff ...
dedupe_key signal_enriched:discovery_ipo_delta:fbdb2188c2758b ...
throttle_s 0
created_at 2026-04-17T15:43:22.010403+00:00
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