Delete row sig_7e3bf043098e from signals

id sig_7e3bf043098e
event_id evt_b82d36b5b467
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_19a371ec4 ...
dedupe_key signal_enriched:news_delta:95d46330edf3cb69
throttle_s 0
created_at 2026-04-20T03:35:20.994269+00:00
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