Delete row 8856 from events

seq 8856
id evt_fcf638be1d25
kind signal_ingest
ts 2026-04-04T00:38:05.972116+00:00
actor collector:macro
subject_entity_ids []
payload {"created_at":"2026-04-04T00:38:05.971 ...
source_ref treasury.gov
confidence 1.0
dedupe_key macro_yield_curve_snapshot:3677cbe78f18d2cb
episode_id NULL
created_at 2026-04-04T00:38:05.972209+00:00
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