Delete row sig_b51689be129d from signals

id sig_b51689be129d
event_id evt_ca1a4cda787b
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_e9aa75250 ...
dedupe_key signal_enriched:news_delta:efd2689a9d2e0463
throttle_s 0
created_at 2026-04-12T00:13:13.901138+00:00
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