Delete row sig_1750cab0f79e from signals

id sig_1750cab0f79e
event_id evt_fdac0a0d92d8
watcher_id NULL
signal_type discovery_sector_rotation_delta
value {"aggregator_url":"https://www.nasdaq. ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_303bf864f ...
dedupe_key signal_enriched:discovery_sector_rotation_delta:70 ...
throttle_s 0
created_at 2026-04-09T15:06:58.940339+00:00
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