Delete row sig_e02918b8ccd7 from signals

id sig_e02918b8ccd7
event_id evt_75c8f3ab97da
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_cd8d734b1 ...
dedupe_key signal_enriched:news_delta:1bae778fe266ed3d
throttle_s 0
created_at 2026-04-19T10:31:33.151735+00:00
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