Delete row sig_9a02d5e880e5 from signals

id sig_9a02d5e880e5
event_id evt_b7ac2536902e
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_88fc4f761 ...
dedupe_key signal_enriched:news_delta:2ca82e3cf9e7b787
throttle_s 0
created_at 2026-04-17T22:17:33.109818+00:00
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