Function assemble_executable_engine_registration 

pub fn assemble_executable_engine_registration<B>(
    config: ExecutableEngineRegistrationConfig<B>,
) -> Result<EngineRegistration, RuntimeConfigError>
where
    B: TensorBackend + Send + Sync + 'static,

Assemble one complete executable provider registration.

Provider adapters supply only provider-owned identity, capability, ingress, event-driver, and cache-owner values. The runtime owns the assembly of the executable witness and its storage metadata so every executable engine enters the runtime through the same invariant-preserving path.

Errors

Returns RuntimeConfigError if the descriptor contains empty or duplicate storage classes, or if its default storage class is not listed in the supported storage classes.