Delete row 477729 from events

seq 477729
id evt_50b7fd577dd1
kind signal_ingest
ts 2026-04-22T01:14:41.864580+00:00
actor collector:opportunity_research
subject_entity_ids []
payload {"created_at":"2026-04-22T01:14:41.864 ...
source_ref targeted_research:case_e6d42c7a099e25d9
confidence 0.6
dedupe_key opportunity_research_snapshot:a81dcb51314667d0
episode_id NULL
created_at 2026-04-22T01:14:43.217180+00:00
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