Delete row sig_a05dc8978861 from signals

id sig_a05dc8978861
event_id evt_290c1516ee2f
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_a9c0b0d0c ...
dedupe_key signal_enriched:news_delta:d5deeab8d5744b46
throttle_s 0
created_at 2026-04-17T09:00:15.584438+00:00
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