Delete row sig_10df9d7d38a1 from signals

id sig_10df9d7d38a1
event_id evt_e0711ff7197f
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_ee7ece4eb ...
dedupe_key signal_enriched:news_delta:536b8b87091bac56
throttle_s 0
created_at 2026-04-20T04:06:15.234418+00:00
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