Delete row sig_e369f4b1b222 from signals

id sig_e369f4b1b222
event_id evt_d7ff970e95a6
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_a503df1a9 ...
dedupe_key signal_enriched:news_delta:49cb532ebcf0477d
throttle_s 0
created_at 2026-04-19T18:38:57.058105+00:00
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