Delete row sig_2ea18558fc50 from signals

id sig_2ea18558fc50
event_id evt_03d5b559b1f1
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_fdf5b83d7 ...
dedupe_key signal_enriched:news_delta:aa4efd8e367e3566
throttle_s 0
created_at 2026-04-06T20:42:08.518833+00:00
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