Delete row sig_44a7a9d91f8a from signals

id sig_44a7a9d91f8a
event_id evt_ddde3b3621a9
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_ba76c525a ...
dedupe_key signal_enriched:news_delta:a6bf74fe2f742176
throttle_s 0
created_at 2026-04-22T04:11:05.532649+00:00
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