Delete row sig_202981ce680b from signals

id sig_202981ce680b
event_id evt_86e6bb2ff0a8
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_24848b156 ...
dedupe_key signal_enriched:news_delta:2ad05bae088b492f
throttle_s 0
created_at 2026-04-10T02:59:34.971159+00:00
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