MULTIPLE SURFACE FAILURES

Counts starts in the last-10 array matching today's surface and checks for a zero-win count when that total reaches 5 or more. This is distinct from NEVER_ON_SURFACE (no experience) and SURFACE_UNPROVEN (limited experience) — this horse has extensive experience on today's surface and has failed every time. Repeated zero-win performance on a specific surface across multiple opportunities is a strong indicator of fundamental unsuitability, whether physical, stylistic, or psychological.