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>

pkg/cmd/risk-assessment/node/create/create.go

@@ -58,9 +58,10 @@ type createResponse struct {
 
 func NewCmdCreate(f *cmdutil.Factory) *cobra.Command {
 	var (
-		flagScopeId  string
-		flagNodeType string
-		flagName     string
+		flagScopeId    string
+		flagBoundaryId string
+		flagNodeType   string
+		flagName       string
 	)
 
 	cmd := &cobra.Command{
@@ -106,7 +107,6 @@ func NewCmdCreate(f *cmdutil.Factory) *cobra.Command {
 						Title("Node type").
 						Options(
 							huh.NewOption("Entity", "ENTITY"),
-							huh.NewOption("Boundary", "BOUNDARY"),
 							huh.NewOption("Asset", "ASSET"),
 							huh.NewOption("Data", "DATA"),
 						).
@@ -126,7 +126,7 @@ func NewCmdCreate(f *cmdutil.Factory) *cobra.Command {
 				return fmt.Errorf("node type is required; pass --node-type or run interactively")
 			}
 
-			if err := cmdutil.ValidateEnum("node-type", flagNodeType, []string{"ENTITY", "BOUNDARY", "ASSET", "DATA"}); err != nil {
+			if err := cmdutil.ValidateEnum("node-type", flagNodeType, []string{"ENTITY", "ASSET", "DATA"}); err != nil {
 				return err
 			}
 
@@ -136,6 +136,10 @@ func NewCmdCreate(f *cmdutil.Factory) *cobra.Command {
 				"name":                  flagName,
 			}
 
+			if flagBoundaryId != "" {
+				input["boundaryId"] = flagBoundaryId
+			}
+
 			data, err := client.Do(
 				createMutation,
 				map[string]any{"input": input},
@@ -162,7 +166,8 @@ func NewCmdCreate(f *cmdutil.Factory) *cobra.Command {
 	}
 
 	cmd.Flags().StringVar(&flagScopeId, "scope-id", "", "Risk assessment scope ID (required)")
-	cmd.Flags().StringVar(&flagNodeType, "node-type", "", "Node type: ENTITY, BOUNDARY, ASSET, DATA (required)")
+	cmd.Flags().StringVar(&flagBoundaryId, "boundary-id", "", "Boundary ID that contains this node (optional)")
+	cmd.Flags().StringVar(&flagNodeType, "node-type", "", "Node type: ENTITY, ASSET, DATA (required)")
 	cmd.Flags().StringVar(&flagName, "name", "", "Node name (required)")
 
 	_ = cmd.MarkFlagRequired("scope-id")