KC-1469: Enterprise root-node isolation is not handled correctly

[IliaTheKeeper]

Enterprise root-node isolation is not handled correctly. The root node’s visibility restriction is returned in GeneralDataEntity.restrictVisibility, rather than the root Node entity, but Commander only reads the node-level value. As a result, root isolation can display incorrectly and toggling root isolation sends the root node ID instead of the enterprise-level identifier (0), causing unreliable behavior.

This patch includes the following:

• Load and map generalData.restrictVisibility onto the enterprise root node.
• Preserve child-node isolation handling from node-level data.
• Toggle root isolation using node ID 0; continue using actual node IDs for child nodes.
• Force-refresh enterprise data after isolation changes and report the verified resulting state or a no-op warning.
• Add unit coverage for root/child isolation loading, root toggle requests, and unchanged server responses.