Delete row sig_f562d2fa84ab from signals

id sig_f562d2fa84ab
event_id evt_0a2ff443c8e0
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_c569df758 ...
dedupe_key signal_enriched:news_delta:5f6e7c01f370b352
throttle_s 0
created_at 2026-04-18T13:34:53.547813+00:00
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