Delete row 306350 from events

seq 306350
id evt_68c42f3ade8b
kind signal_candidate_ingest
ts 2026-04-19T12:46:14.065812+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-19T12:46:14.065 ...
source_ref crypto_mixed
confidence 1.0
dedupe_key discovery_crypto_extremes_delta:f58be7385e15fbd9
episode_id NULL
created_at 2026-04-19T12:46:20.410157+00:00
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