Delete row 54907 from events

seq 54907
id evt_f444ea54ab75
kind signal_candidate_ingest
ts 2026-04-16T03:09:32.859249+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-16T03:09:32.859 ...
source_ref crypto_mixed
confidence 1.0
dedupe_key discovery_crypto_extremes_delta:b5ca14f213fe62e3
episode_id NULL
created_at 2026-04-16T03:09:40.465013+00:00
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