Delete row sig_e20ade33a618 from signals

id sig_e20ade33a618
event_id evt_6e75635ba603
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_2b061b62c ...
dedupe_key signal_enriched:news_delta:8c3691df791221cd
throttle_s 0
created_at 2026-04-21T03:02:40.536843+00:00
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