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/update/update.go

@@ -51,8 +51,10 @@ type updateResponse struct {
 
 func NewCmdUpdate(f *cmdutil.Factory) *cobra.Command {
 	var (
-		flagName     string
-		flagNodeType string
+		flagName          string
+		flagNodeType      string
+		flagBoundaryId    string
+		flagClearBoundary bool
 	)
 
 	cmd := &cobra.Command{
@@ -78,6 +80,10 @@ func NewCmdUpdate(f *cmdutil.Factory) *cobra.Command {
 				cmdutil.TokenRefreshOption(cfg, host, hc),
 			)
 
+			if flagClearBoundary && cmd.Flags().Changed("boundary-id") {
+				return fmt.Errorf("cannot use --boundary-id and --clear-boundary together")
+			}
+
 			input := map[string]any{
 				"id": args[0],
 			}
@@ -87,13 +93,21 @@ func NewCmdUpdate(f *cmdutil.Factory) *cobra.Command {
 			}
 
 			if cmd.Flags().Changed("node-type") {
-				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
 				}
 
 				input["nodeType"] = flagNodeType
 			}
 
+			if cmd.Flags().Changed("boundary-id") {
+				input["boundaryId"] = flagBoundaryId
+			}
+
+			if flagClearBoundary {
+				input["boundaryId"] = nil
+			}
+
 			if len(input) == 1 {
 				return fmt.Errorf("at least one field must be specified for update")
 			}
@@ -124,7 +138,9 @@ func NewCmdUpdate(f *cmdutil.Factory) *cobra.Command {
 	}
 
 	cmd.Flags().StringVar(&flagName, "name", "", "Node name")
-	cmd.Flags().StringVar(&flagNodeType, "node-type", "", "Node type: ENTITY, BOUNDARY, ASSET, DATA")
+	cmd.Flags().StringVar(&flagNodeType, "node-type", "", "Node type: ENTITY, ASSET, DATA")
+	cmd.Flags().StringVar(&flagBoundaryId, "boundary-id", "", "Boundary ID that contains this node")
+	cmd.Flags().BoolVar(&flagClearBoundary, "clear-boundary", false, "Remove the node from its boundary (move to top level)")
 
 	return cmd
 }