Delete row sig_0ed378220f68 from signals

id sig_0ed378220f68
event_id evt_d426f1f33cb8
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_b928ce658 ...
dedupe_key signal_enriched:news_delta:4598db7651daf129
throttle_s 0
created_at 2026-04-22T04:11:05.681658+00:00
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