Delete row 473483 from events

seq 473483
id evt_2c4ef2e45982
kind signal_candidate_ingest
ts 2026-04-21T21:31:18.735453+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-21T21:31:18.735 ...
source_ref crypto_mixed
confidence 1.0
dedupe_key discovery_crypto_extremes_delta:7d4fff4efc7aa856
episode_id NULL
created_at 2026-04-21T21:31:27.085300+00:00
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