Delete row sig_522201be9687 from signals

id sig_522201be9687
event_id evt_8d69f86895d7
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_5d17bfb56 ...
dedupe_key signal_enriched:discovery_sector_rotation_delta:a3 ...
throttle_s 0
created_at 2026-04-06T18:42:37.816572+00:00
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