pub fn split_namespace(ns: &str) -> Result<(&str, &str), AdminError>Expand description
Split a tenant/namespace string into its two segments.
Exposed for the CLI (and any other admin-client wrapper) so the
tenant/namespace shape used by the namespace-scoped list verbs
(functions list, sources list, sinks list, packages list)
validates against the same validate_segment rules every admin
method enforces internally — no parallel parsers, no divergent
error categories.