Delete row 450717 from events

seq 450717
id evt_caddd5e11611
kind signal_candidate_ingest
ts 2026-04-20T15:42:12.815098+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-20T15:42:12.815 ...
source_ref crypto_mixed
confidence 1.0
dedupe_key discovery_crypto_extremes_delta:727fbf5864e3f594
episode_id NULL
created_at 2026-04-20T15:42:22.738557+00:00
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