Delete row sig_14324ded257c from signals

id sig_14324ded257c
event_id evt_fa26046981ce
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_88987b34f ...
dedupe_key signal_enriched:news_delta:d63d9b5df4cd7f40
throttle_s 0
created_at 2026-04-21T13:43:50.830922+00:00
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