Delete row sig_01e173dc0637 from signals

id sig_01e173dc0637
event_id evt_508625690b8a
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_1f9c52995 ...
dedupe_key signal_enriched:news_delta:e0b43750b2aea3d7
throttle_s 0
created_at 2026-04-18T06:45:02.837521+00:00
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