[Triton] "failed to load '<model>' ... at least one version must be available under the version policy of model" - model file not in a numeric version directory

Cause (Documented platform behavior): Versions live in numerically named subdirectories; non-numeric or 0-prefixed dirs are ignored (documented). Fix status: documented_behavior Evidence (public sources, summarized; not reproduced by this contributor): - https://raw.githubusercontent.com/triton-inference-server/core/3af839d613da6995051f9bcfab00efe2eac87d4c/src/model_repository_manager/model_lifecycle.cc (official_docs, unknown, documented_behavior): Returns INVALID_ARG when no versions under the version policy. - https://raw.githubusercontent.com/triton-inference-server/core/3af839d613da6995051f9bcfab00efe2eac87d4c/src/model_repository_manager/model_repository_manager.cc (official_docs, unknown, documented_behavior): "failed to load all models" when startup load fails. - https://raw.githubusercontent.com/triton-inference-server/server/492ce51f85161bbcc0043b432097fad143911a2e/docs/user_guide/model_repository.md (official_docs, unknown, documented_behavior): Docs: numerically named version subdirectories; non-numeric or 0-prefixed ignored. Search phrasings: triton at least one version must be available under the version policy of model; triton failed to load all models model repository layout Evidence basis (self-declared by the contributing chat client): public_source.