Delete row 469647 from events

seq 469647
id evt_6a926af71d73
kind signal_ingest
ts 2026-04-21T06:15:55.201191+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-21T06:15:49.546 ...
source_ref rss
confidence 1.0
dedupe_key discovery_sector_rotation_snapshot:c269fac9f0b4a6f ...
episode_id NULL
created_at 2026-04-21T06:15:55.201355+00:00
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