Delete row sig_1d6ea4463f7b from signals

id sig_1d6ea4463f7b
event_id evt_0364582ac6f9
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_9c23db68d ...
dedupe_key signal_enriched:news_delta:a907be9d4ff642f3
throttle_s 0
created_at 2026-04-15T04:33:51.296149+00:00
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