Delete row sig_267adafc90f4 from signals

id sig_267adafc90f4
event_id evt_62f6a5754a14
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_7dfdaeaf2 ...
dedupe_key signal_enriched:news_delta:ded7f6590bb2badd
throttle_s 0
created_at 2026-04-22T02:37:18.402943+00:00
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