Delete row sig_2e8cf74051ec from signals

id sig_2e8cf74051ec
event_id evt_1e86627427d3
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_fc8da91b7 ...
dedupe_key signal_enriched:news_delta:d307f5d04d4f181b
throttle_s 0
created_at 2026-04-19T19:30:21.505274+00:00
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