Delete row sigfp:signal_enriched:discovery_sec_filing_delta:590c94f40e1b4c53 from signal_fps

fp sigfp:signal_enriched:discovery_sec_filing_delta:5 ...
status open
signal_type discovery_sec_filing_delta
signal_id NULL
watcher_id NULL
created_at 2026-04-09T19:30:05.373434+00:00
updated_at 2026-04-09T19:30:05.373434+00:00
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