Delete row 528 from events

seq 528
id evt_e26561349644
kind signal_candidate_ingest
ts 2026-04-07T23:23:54.391414+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-07T23:23:54.391 ...
source_ref sec:edgar
confidence 1.0
dedupe_key discovery_sec_filing_delta:5f2f262158ecac52
episode_id NULL
created_at 2026-04-07T23:24:05.592336+00:00
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