Function default_view_factory 

pub async fn default_view_factory(
    runtime: Arc<RuntimeEnv>,
    lake: Arc<DataLakeConnection>,
    default_audience: Arc<str>,
) -> Result<ViewFactory, Error>

Creates the default ViewFactory with all built-in views.

default_audience is the deployment’s MICROMEGAS_DEFAULT_AUDIENCE, which the blocks view binds when it materializes. Callers source it from LakehouseContext::default_audience so every role that builds a factory bakes the same value into partitions – notably the maintenance role, which is the one that actually materializes the five global views. log_stats is no longer one of them: it is a seeded row in lakehouse_view_set_definitions, folded in by ViewRegistry rather than by this function.