Delete row 6499 from events

seq 6499
id evt_9e8b49ff3607
kind signal_candidate_ingest
ts 2026-04-08T12:49:17.656805+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-08T12:49:17.656 ...
source_ref rss
confidence 1.0
dedupe_key discovery_ipo_delta:c7efb281f96f3fcb
episode_id NULL
created_at 2026-04-08T12:49:20.496209+00:00
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