Delete row 477711 from events

seq 477711
id evt_432378bf3f5f
kind signal_ingest
ts 2026-04-22T01:09:12.198813+00:00
actor collector:opportunity_research
subject_entity_ids []
payload {"created_at":"2026-04-22T01:09:12.198 ...
source_ref web_search:serper
confidence 0.6
dedupe_key opportunity_research_snapshot:e9d7a5bb87bc8a70
episode_id NULL
created_at 2026-04-22T01:09:13.888745+00:00
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