Delete row sig_17330c100f4d from signals

id sig_17330c100f4d
event_id evt_1fa9b2700310
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_404cf9149 ...
dedupe_key signal_enriched:news_delta:24ed56b3cc014b00
throttle_s 0
created_at 2026-04-18T01:25:09.870041+00:00
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