Expose ITAM devices on MCP, CLI, and n8n

Devices were only available through GraphQL and the agent API. Add
list/get/revoke/delete/set-owner across MCP, prb, and n8n, with latest
postures nested on list and get responses.

Signed-off-by: Ludovic Vielle <ludovic@probo.com>

packages/n8n-node/nodes/Probo/Probo.node.ts

@@ -128,6 +128,11 @@ export class Probo implements INodeType {
 						value: 'datum',
 						description: 'Manage data',
 					},
+					{
+						name: 'Device',
+						value: 'device',
+						description: 'Manage ITAM devices',
+					},
 					{
 						name: 'Document',
 						value: 'document',