Delete row 480284 from events

seq 480284
id evt_0bc3e8e3d640
kind signal_candidate_ingest
ts 2026-04-22T10:08:37.182699+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-22T10:08:37.182 ...
source_ref rss
confidence 1.0
dedupe_key discovery_unusual_volume_delta:05ad59a4d1c626fd
episode_id NULL
created_at 2026-04-22T10:08:41.089596+00:00
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