Delete row sig_10add1943f0c from signals

id sig_10add1943f0c
event_id evt_45ec0baf02b6
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_e5de05bda ...
dedupe_key signal_enriched:news_delta:5ade5c68d8f689c9
throttle_s 0
created_at 2026-04-21T22:00:08.772822+00:00
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