Delete row sig_2dd0d243fe1d from signals

id sig_2dd0d243fe1d
event_id evt_de42cea07342
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_29b268976 ...
dedupe_key signal_enriched:news_delta:adbafc359463744d
throttle_s 0
created_at 2026-04-14T07:16:49.026246+00:00
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