Delete row sig_af01e292e451 from signals

id sig_af01e292e451
event_id evt_15f53e409c28
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_5582a13c0 ...
dedupe_key signal_enriched:news_delta:f9d8268ae3c9065c
throttle_s 0
created_at 2026-04-10T19:36:11.838618+00:00
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