Delete row sig_edf1d1f057fe from signals

id sig_edf1d1f057fe
event_id evt_a7e5c6364e7a
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_628a27707 ...
dedupe_key signal_enriched:news_delta:1e2a5ada536ee874
throttle_s 0
created_at 2026-04-10T01:56:34.553500+00:00
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