Delete row sig_37112b18a4ca from signals

id sig_37112b18a4ca
event_id evt_da04755611ab
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_d46bcf5cb ...
dedupe_key signal_enriched:news_delta:2b5e114fd638ed5f
throttle_s 0
created_at 2026-04-17T03:36:52.577223+00:00
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