Delete row sig_046f5ee9f86a from signals

id sig_046f5ee9f86a
event_id evt_71e92201500f
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_52d228146 ...
dedupe_key signal_enriched:news_delta:fb4711c06b86e0d6
throttle_s 0
created_at 2026-04-12T06:49:41.676295+00:00
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