Delete row sig_e5d474c1dc9e from signals

id sig_e5d474c1dc9e
event_id evt_613d0ae1cbcd
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_7b57d113b ...
dedupe_key signal_enriched:news_delta:b471f31ee48b2357
throttle_s 0
created_at 2026-04-20T02:49:52.528250+00:00
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