Delete row sig_d653cb756c01 from signals

id sig_d653cb756c01
event_id evt_27fde550dc2b
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_349ab96b1 ...
dedupe_key signal_enriched:news_delta:cfe24c3e3b1b1229
throttle_s 0
created_at 2026-04-22T02:22:08.677237+00:00
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