Delete row sig_d24c675568bd from signals

id sig_d24c675568bd
event_id evt_9fcfd001f04a
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_b1685cf8e ...
dedupe_key signal_enriched:news_delta:a5d640f776c06b85
throttle_s 0
created_at 2026-04-20T17:14:49.952774+00:00
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