Add risk assessment boundary model

Introduce RiskAssessmentBoundary as a first-class, self-nesting entity that
groups nodes within a risk assessment scope, and thread it through every
surface.

- coredata: new risk_assessment_boundaries table + migration, boundary_id on
  nodes, self-referential parent_boundary_id, entity type registration
- riskmanagement: boundary CRUD service methods, boundary_id wiring on node
  create/update, scope-membership and self-parent validation, nested-subgraph
  Mermaid rendering
- IAM: core:risk-assessment-boundary:{get,list,create,update,delete} actions
  and viewer/auditor read policies
- console GraphQL: RiskAssessmentBoundary type, connection, order enum, CRUD
  mutations, boundaries field on scope, boundaryId on nodes
- CLI: risk-assessment boundary command group and --boundary-id on nodes
- MCP: boundary tools and boundary_id on node tools
- n8n: boundary operations and boundary fields on node operations
- console UI: boundary list/create/edit, boundary selector on nodes, diagram
  refetch on boundary changes

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

packages/n8n-node/nodes/Probo/actions/riskAssessment/createNode.operation.ts

@@ -45,10 +45,6 @@ export const description: INodeProperties[] = [
 				name: 'Entity',
 				value: 'ENTITY',
 			},
-			{
-				name: 'Boundary',
-				value: 'BOUNDARY',
-			},
 			{
 				name: 'Asset',
 				value: 'ASSET',
@@ -76,6 +72,19 @@ export const description: INodeProperties[] = [
 		description: 'The name of the node',
 		required: true,
 	},
+	{
+		displayName: 'Boundary ID',
+		name: 'boundaryId',
+		type: 'string',
+		displayOptions: {
+			show: {
+				resource: ['riskAssessment'],
+				operation: ['createNode'],
+			},
+		},
+		default: '',
+		description: 'The ID of the boundary that contains this node (optional)',
+	},
 ];
 
 export async function execute(
@@ -85,6 +94,7 @@ export async function execute(
 	const riskAssessmentScopeId = this.getNodeParameter('riskAssessmentScopeId', itemIndex) as string;
 	const nodeType = this.getNodeParameter('nodeType', itemIndex) as string;
 	const name = this.getNodeParameter('name', itemIndex) as string;
+	const boundaryId = this.getNodeParameter('boundaryId', itemIndex, '') as string;
 
 	const query = `
 		mutation CreateRiskAssessmentNode($input: CreateRiskAssessmentNodeInput!) {
@@ -93,6 +103,7 @@ export async function execute(
 					node {
 						id
 						riskAssessmentScopeId
+						boundaryId
 						nodeType
 						name
 						createdAt
@@ -103,9 +114,10 @@ export async function execute(
 		}
 	`;
 
-	const responseData = await proboApiRequest.call(this, query, {
-		input: { riskAssessmentScopeId, nodeType, name },
-	});
+	const input: Record<string, unknown> = { riskAssessmentScopeId, nodeType, name };
+	if (boundaryId) input.boundaryId = boundaryId;
+
+	const responseData = await proboApiRequest.call(this, query, { input });
 
 	return {
 		json: responseData,