Delete row sig_e1e2d53a2590 from signals

id sig_e1e2d53a2590
event_id evt_51152f93093d
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_7209472c0 ...
dedupe_key signal_enriched:news_delta:571b1996e9f7429a
throttle_s 0
created_at 2026-04-10T18:06:51.948398+00:00
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