Delete row sig_a20ca812c94a from signals

id sig_a20ca812c94a
event_id evt_9d7ff480b606
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_058c3595b ...
dedupe_key signal_enriched:news_delta:3efdabcd13ded8f3
throttle_s 0
created_at 2026-04-17T23:19:06.777569+00:00
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