Delete row sig_779d9df29764 from signals

id sig_779d9df29764
event_id evt_508f2477e495
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_e07e5ba8d ...
dedupe_key signal_enriched:discovery_sector_rotation_delta:c7 ...
throttle_s 0
created_at 2026-04-22T12:11:11.616908+00:00
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