Delete row sig_d10cc20ba696 from signals

id sig_d10cc20ba696
event_id evt_1e14a93499e5
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_172c4faf2 ...
dedupe_key signal_enriched:news_delta:98b47927444ff653
throttle_s 0
created_at 2026-04-20T20:05:39.015594+00:00
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