Delete row sig_41df118be9eb from signals

id sig_41df118be9eb
event_id evt_4f766eaf2be5
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_237465825 ...
dedupe_key signal_enriched:news_delta:01b36ff82bd37c7b
throttle_s 0
created_at 2026-04-21T01:31:11.945089+00:00
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