Delete row sig_798c06ac322f from signals

id sig_798c06ac322f
event_id evt_bea838cb2538
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_2ad313ef9 ...
dedupe_key signal_enriched:news_delta:355ee8e180df58a5
throttle_s 0
created_at 2026-04-09T06:55:02.523857+00:00
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