Delete row sig_de92c24e6bb4 from signals

id sig_de92c24e6bb4
event_id evt_e06fd5f35b19
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_483f04006 ...
dedupe_key signal_enriched:news_delta:21bb4668e8d11016
throttle_s 0
created_at 2026-04-07T04:04:22.009850+00:00
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