Delete row sig_f663aee1ae44 from signals

id sig_f663aee1ae44
event_id evt_ad27ca61181a
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_bdbb9571d ...
dedupe_key signal_enriched:news_delta:f556f159b41581c2
throttle_s 0
created_at 2026-04-20T11:00:45.039785+00:00
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