Delete row sig_0f3e932029ec from signals

id sig_0f3e932029ec
event_id evt_945e6166f3f2
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_bfcd14d95 ...
dedupe_key signal_enriched:news_delta:13f474d9f69b8ab9
throttle_s 0
created_at 2026-04-16T20:41:42.668074+00:00
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