Delete row sig_ae7951b0f340 from signals

id sig_ae7951b0f340
event_id evt_1377a125ad4e
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_c18e92097 ...
dedupe_key signal_enriched:news_delta:0b7f5aecb6d1f6ae
throttle_s 0
created_at 2026-04-10T19:36:11.894236+00:00
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