Delete row sigfp:signal_enriched:discovery_ipo_delta:7a4ca439a60d4b3a from signal_fps

fp sigfp:signal_enriched:discovery_ipo_delta:7a4ca439 ...
status open
signal_type discovery_ipo_delta
signal_id sig_d63861f65cc3
watcher_id NULL
created_at 2026-04-11T18:04:10.294989+00:00
updated_at 2026-04-11T18:04:10.294989+00:00
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