Delete row sig_4b84409c8655 from signals

id sig_4b84409c8655
event_id evt_9829c658b48b
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_fde53d4a5 ...
dedupe_key signal_enriched:news_delta:bb63075718871b40
throttle_s 0
created_at 2026-04-13T11:48:55.517296+00:00
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