Delete row sig_381775cc610b from signals

id sig_381775cc610b
event_id evt_da229444954b
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_8b40ed359 ...
dedupe_key signal_enriched:news_delta:ea6926949a8dd7ac
throttle_s 0
created_at 2026-04-07T23:23:38.933193+00:00
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