Delete row sig_bad3997a3115 from signals

id sig_bad3997a3115
event_id evt_d6fca158d6c0
watcher_id NULL
signal_type discovery_sector_rotation_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_88a99eac3 ...
dedupe_key signal_enriched:discovery_sector_rotation_delta:6d ...
throttle_s 0
created_at 2026-04-13T07:26:15.766370+00:00
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