Delete row sig_705ee26e24fa from signals

id sig_705ee26e24fa
event_id evt_2555a95d2aa0
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_9d3611fa5 ...
dedupe_key signal_enriched:news_delta:76397c6cc3ae9556
throttle_s 0
created_at 2026-04-18T11:33:38.877398+00:00
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