Delete row sig_d995dd887505 from signals

id sig_d995dd887505
event_id evt_d8cf276ce0bf
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_afd6ddb77 ...
dedupe_key signal_enriched:discovery_ipo_delta:1fcdab4c7c2772 ...
throttle_s 0
created_at 2026-04-09T22:59:43.472613+00:00
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