Delete row sig_e0167ce1cf92 from signals

id sig_e0167ce1cf92
event_id evt_78d193bb762f
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_599054632 ...
dedupe_key signal_enriched:news_delta:65e2b60a237760f4
throttle_s 0
created_at 2026-04-19T18:00:50.212444+00:00
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