Delete row sig_f231f98f7664 from signals

id sig_f231f98f7664
event_id evt_0c8c93513306
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_5537469ce ...
dedupe_key signal_enriched:news_delta:cca388140e046257
throttle_s 0
created_at 2026-04-19T22:16:21.348778+00:00
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