Delete row sig_3a5f6650f460 from signals

id sig_3a5f6650f460
event_id evt_8c9eb9872190
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_a8d52acdc ...
dedupe_key signal_enriched:news_delta:8903146d31bea9f8
throttle_s 0
created_at 2026-04-20T12:01:17.870995+00:00
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