Delete row sig_d3ae719ac660 from signals

id sig_d3ae719ac660
event_id evt_21821f3874b1
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_4bea2a699 ...
dedupe_key signal_enriched:news_delta:0fea26afa5b8a251
throttle_s 0
created_at 2026-04-20T00:02:16.615308+00:00
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