Delete row sig_ecde5aaf3663 from signals

id sig_ecde5aaf3663
event_id evt_4b3ab2272fe6
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_157456aad ...
dedupe_key signal_enriched:news_delta:306f0801176db35f
throttle_s 0
created_at 2026-04-11T21:03:05.886699+00:00
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