Delete row sig_a471e1b98309 from signals

id sig_a471e1b98309
event_id evt_2fffb0330a46
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_244fa0951 ...
dedupe_key signal_enriched:discovery_ipo_delta:fc4f3f990837a0 ...
throttle_s 0
created_at 2026-04-10T20:20:53.146920+00:00
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