Delete row sig_b029ea189012 from signals

id sig_b029ea189012
event_id evt_593645639964
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_3f4166041 ...
dedupe_key signal_enriched:news_delta:d7bbcba888e91479
throttle_s 0
created_at 2026-04-08T00:41:56.510606+00:00
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