Delete row sig_c0fc6e94d66f from signals

id sig_c0fc6e94d66f
event_id evt_5956d04a9b30
watcher_id NULL
signal_type news_headline_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source news_rss
reason_trace {"_evidence_event_ids":["evt_c79444b9f ...
dedupe_key signal_enriched:news_delta:755471b3d7a4b0ab
throttle_s 0
created_at 2026-04-19T03:01:54.644092+00:00
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