Delete row sig_74919102d908 from signals

id sig_74919102d908
event_id evt_018cae275e80
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_6fc635046 ...
dedupe_key signal_enriched:news_delta:5af878c3e80819b2
throttle_s 0
created_at 2026-04-04T12:33:18.133211+00:00
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