Add CMMI maturity level to compliance controls

Adds an optional CMMI 0-5 maturity level field to Control to support
ISO 27001 clause 9.1 effectiveness measurement and HITRUST CSF maturity
requirements. The field is nullable, framework-agnostic, and exposed
across all four API surfaces (GraphQL, MCP, CLI, n8n) plus the
generated SoA document.

Signed-off-by: Alejandro Juan <alejandrojuan@alejandrojuan.com>

packages/n8n-node/nodes/Probo/actions/control/create.operation.ts

@@ -71,6 +71,28 @@ export const description: INodeProperties[] = [
 		default: '',
 		description: 'The description of the control',
 	},
+	{
+		displayName: 'Maturity Level',
+		name: 'maturityLevel',
+		type: 'options',
+		displayOptions: {
+			show: {
+				resource: ['control'],
+				operation: ['create'],
+			},
+		},
+		options: [
+			{ name: '0 - None', value: 'NONE' },
+			{ name: '1 - Initial', value: 'INITIAL' },
+			{ name: '2 - Managed', value: 'MANAGED' },
+			{ name: '3 - Defined', value: 'DEFINED' },
+			{ name: '4 - Quantitatively Managed', value: 'QUANTITATIVELY_MANAGED' },
+			{ name: '5 - Optimizing', value: 'OPTIMIZING' },
+			{ name: 'Not Set', value: '' },
+		],
+		default: '',
+		description: 'CMMI 0-5 maturity level (optional)',
+	},
 ];
 
 export async function execute(
@@ -81,6 +103,7 @@ export async function execute(
 	const sectionTitle = this.getNodeParameter('sectionTitle', itemIndex) as string;
 	const name = this.getNodeParameter('name', itemIndex) as string;
 	const description = this.getNodeParameter('description', itemIndex, '') as string;
+	const maturityLevel = this.getNodeParameter('maturityLevel', itemIndex, '') as string;
 
 	const query = `
 		mutation CreateControl($input: CreateControlInput!) {
@@ -91,6 +114,7 @@ export async function execute(
 						sectionTitle
 						name
 						description
+						maturityLevel
 						createdAt
 						updatedAt
 					}
@@ -106,6 +130,7 @@ export async function execute(
 			name,
 			bestPractice: true,
 			...(description && { description }),
+			...(maturityLevel && { maturityLevel }),
 		},
 	};