Delete row sig_4a499d46113b from signals

id sig_4a499d46113b
event_id evt_417e4ec75423
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_f4f6c12eb ...
dedupe_key signal_enriched:news_delta:624abe8a62b9444f
throttle_s 0
created_at 2026-04-18T05:44:29.959892+00:00
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