Function parse_tenancy_mode

atomic-cli/src/commands/identity/register.rs:450–454

Interpret the registration response's tenancy signal. `mode: "single"` (server v1.4.0+) marks a single-tenant deployment and carries the org `role` the identity received; anything else — `"multi"` or a missing field (older servers) — keeps multi-tenant URL semantics. Returns `(single_tenant, role)`.

(data: &serde_json::Value)

/// or a missing field (older servers) — keeps multi-tenant URL semantics.
/// Returns `(single_tenant, role)`.
fn parse_tenancy_mode(data: &serde_json::Value) -> (bool, Option<&str>) {
    let single = data.get("mode").and_then(|v| v.as_str()) == Some("single");
    let role = data.get("role").and_then(|v| v.as_str());
    (single, role)
}

#[cfg(test)]
mod tests {