Delete row sig_5f25218b2dec from signals

id sig_5f25218b2dec
event_id evt_4e13440d97de
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_d5f2d744e ...
dedupe_key signal_enriched:news_delta:389c6c4a08543685
throttle_s 0
created_at 2026-04-19T02:09:54.724777+00:00
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