Delete row sig_e5fa4dd6d55f from signals

id sig_e5fa4dd6d55f
event_id evt_cfc189c9c945
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_e88c2fa52 ...
dedupe_key signal_enriched:news_delta:25273b31056c2123
throttle_s 0
created_at 2026-04-19T12:39:39.773150+00:00
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