Function bind_memory_runtime 

pub fn bind_memory_runtime(
    runtime: Rc<MemoryRuntime<DefaultMemoryImpl>>,
) -> Result<(), MemoryRuntimeBindingError>

Bind a bootstrapped host runtime before opening IcyDB stores.

Composed hosts bootstrap their complete declarations and retain the same Rc for their other consumers. Rebinding that exact instance is idempotent; replacing it is rejected so existing handles cannot acquire another authority.