Delete row sig_790365f978a2 from signals

id sig_790365f978a2
event_id evt_4af3ca0fc650
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_2f9c3cb5b ...
dedupe_key signal_enriched:news_delta:fcc27e41c07a53b2
throttle_s 0
created_at 2026-04-20T13:18:59.846583+00:00
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