Delete row sig_e5c84eefb158 from signals

id sig_e5c84eefb158
event_id evt_26ccbe654055
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_badc9c9e9 ...
dedupe_key signal_enriched:news_delta:539730012d3b5b50
throttle_s 0
created_at 2026-04-20T04:36:43.995768+00:00
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