Delete row sig_2ae589389063 from signals

id sig_2ae589389063
event_id evt_f33aeb8c6686
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_4c28a035d ...
dedupe_key signal_enriched:news_delta:9b73e75a720d3940
throttle_s 0
created_at 2026-04-20T03:04:57.421983+00:00
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