Delete row sigfp:signal_enriched:discovery_sec_filing_delta:43403708ce9b3a65 from signal_fps

fp sigfp:signal_enriched:discovery_sec_filing_delta:4 ...
status open
signal_type discovery_sec_filing_delta
signal_id NULL
watcher_id NULL
created_at 2026-04-15T07:58:37.436190+00:00
updated_at 2026-04-15T07:58:37.436190+00:00
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