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/boundary/create/create.go

@@ -0,0 +1,153 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package create
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/charmbracelet/huh"
+	"github.com/spf13/cobra"
+	"go.probo.inc/probo/pkg/cli/api"
+	"go.probo.inc/probo/pkg/cmd/cmdutil"
+)
+
+const createMutation = `
+mutation($input: CreateRiskAssessmentBoundaryInput!) {
+  createRiskAssessmentBoundary(input: $input) {
+    riskAssessmentBoundaryEdge {
+      node {
+        id
+        riskAssessmentScopeId
+        parentBoundaryId
+        name
+        createdAt
+        updatedAt
+      }
+    }
+  }
+}
+`
+
+type createResponse struct {
+	CreateRiskAssessmentBoundary struct {
+		RiskAssessmentBoundaryEdge struct {
+			Node struct {
+				ID                    string  `json:"id"`
+				RiskAssessmentScopeId string  `json:"riskAssessmentScopeId"`
+				ParentBoundaryId      *string `json:"parentBoundaryId"`
+				Name                  string  `json:"name"`
+				CreatedAt             string  `json:"createdAt"`
+				UpdatedAt             string  `json:"updatedAt"`
+			} `json:"node"`
+		} `json:"riskAssessmentBoundaryEdge"`
+	} `json:"createRiskAssessmentBoundary"`
+}
+
+func NewCmdCreate(f *cmdutil.Factory) *cobra.Command {
+	var (
+		flagScopeId  string
+		flagParentId string
+		flagName     string
+	)
+
+	cmd := &cobra.Command{
+		Use:   "create",
+		Short: "Create a new risk assessment boundary",
+		Example: `  # Create a boundary interactively
+  prb risk-assessment boundary create --scope-id <id>
+
+  # Create a boundary non-interactively
+  prb risk-assessment boundary create --scope-id <id> --name "Production environment"
+
+  # Create a boundary nested inside another boundary
+  prb risk-assessment boundary create --scope-id <id> --name "Database tier" --parent-id <boundary-id>`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := f.Config()
+			if err != nil {
+				return err
+			}
+
+			host, hc, err := cfg.DefaultHost()
+			if err != nil {
+				return err
+			}
+
+			client := api.NewClient(
+				host,
+				hc.Token,
+				"/api/console/v1/graphql",
+				cfg.HTTPTimeoutDuration(),
+				cmdutil.TokenRefreshOption(cfg, host, hc),
+			)
+
+			if f.IOStreams.IsInteractive() {
+				if flagName == "" {
+					err := huh.NewInput().
+						Title("Boundary name").
+						Value(&flagName).
+						Run()
+					if err != nil {
+						return err
+					}
+				}
+			}
+
+			if flagName == "" {
+				return fmt.Errorf("name is required; pass --name or run interactively")
+			}
+
+			input := map[string]any{
+				"riskAssessmentScopeId": flagScopeId,
+				"name":                  flagName,
+			}
+
+			if flagParentId != "" {
+				input["parentBoundaryId"] = flagParentId
+			}
+
+			data, err := client.Do(
+				createMutation,
+				map[string]any{"input": input},
+			)
+			if err != nil {
+				return err
+			}
+
+			var resp createResponse
+			if err := json.Unmarshal(data, &resp); err != nil {
+				return fmt.Errorf("cannot parse response: %w", err)
+			}
+
+			r := resp.CreateRiskAssessmentBoundary.RiskAssessmentBoundaryEdge.Node
+			_, _ = fmt.Fprintf(
+				f.IOStreams.Out,
+				"Created risk assessment boundary %s (%s)\n",
+				r.ID,
+				r.Name,
+			)
+
+			return nil
+		},
+	}
+
+	cmd.Flags().StringVar(&flagScopeId, "scope-id", "", "Risk assessment scope ID (required)")
+	cmd.Flags().StringVar(&flagParentId, "parent-id", "", "Parent boundary ID (optional, for nested boundaries)")
+	cmd.Flags().StringVar(&flagName, "name", "", "Boundary name (required)")
+
+	_ = cmd.MarkFlagRequired("scope-id")
+
+	return cmd
+}