Delete row sig_33d6dc899941 from signals

id sig_33d6dc899941
event_id evt_a77fab567213
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_b7d342c77 ...
dedupe_key signal_enriched:news_delta:398421069ab20ab6
throttle_s 0
created_at 2026-04-16T14:20:44.371280+00:00
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