Delete row sig_0326eca09a2f from signals

id sig_0326eca09a2f
event_id evt_657924a18b00
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_182e63f66 ...
dedupe_key signal_enriched:news_delta:2c2c7871213976a0
throttle_s 0
created_at 2026-04-20T17:59:52.070710+00:00
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