Delete row sig_1e3c0ec18a2e from signals

id sig_1e3c0ec18a2e
event_id evt_5e92999d0f09
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_2bae3a4b1 ...
dedupe_key signal_enriched:news_delta:413a1e65d088c4ea
throttle_s 0
created_at 2026-04-21T22:00:08.750288+00:00
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