Delete row sig_f1010197c74e from signals

id sig_f1010197c74e
event_id evt_eb642d7c269c
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_8f6b79eec ...
dedupe_key signal_enriched:news_delta:8eb6e655ca83aa19
throttle_s 0
created_at 2026-04-21T22:00:08.718696+00:00
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