Delete row sig_015583dd7505 from signals

id sig_015583dd7505
event_id evt_e317dda7b5e5
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_5ab5cbff8 ...
dedupe_key signal_enriched:news_delta:f5d028b33ddb96f1
throttle_s 0
created_at 2026-04-17T08:08:32.025353+00:00
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