Function model_provider_runtime_options_from_model_provider_entry 

pub fn model_provider_runtime_options_from_model_provider_entry(
    config: &Config,
    entry: Option<&ModelProviderConfig>,
) -> ModelProviderRuntimeOptions

Build ModelProviderRuntimeOptions from a specific ModelProviderConfig entry plus the global config’s process-wide settings (zeroclaw_dir, secrets, runtime). Splits out the per-entry resolution so callers with agent context can pass in the alias-resolved entry instead of hitting first_model_provider().

Pass None when no model_provider entry is resolvable (e.g. tests or fresh config with no models configured); falls back to safe defaults.