Delete row sig_02e9b1b6d702 from signals

id sig_02e9b1b6d702
event_id evt_e1c9563ddb59
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_ab13ae06e ...
dedupe_key signal_enriched:news_delta:74efbcb292adb44d
throttle_s 0
created_at 2026-04-21T19:56:17.575906+00:00
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