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/server/api/mcp/v1/schema.resolvers.go

@@ -6497,6 +6497,7 @@ func (r *Resolver) AddRiskAssessmentNodeTool(ctx context.Context, req *mcp.CallT
 
 	n, err := r.riskManagement.CreateNode(ctx, scope, riskmanagement.CreateRiskAssessmentNodeRequest{
 		RiskAssessmentScopeID: input.RiskAssessmentScopeID,
+		BoundaryID:            input.BoundaryID,
 		NodeType:              input.NodeType,
 		Name:                  input.Name,
 	})
@@ -6515,10 +6516,16 @@ func (r *Resolver) UpdateRiskAssessmentNodeTool(ctx context.Context, req *mcp.Ca
 		return nil, types.UpdateRiskAssessmentNodeOutput{}, err
 	}
 
+	var boundaryID **gid.GID
+	if input.BoundaryID != nil {
+		boundaryID = &input.BoundaryID
+	}
+
 	n, err := r.riskManagement.UpdateNode(ctx, scope, riskmanagement.UpdateRiskAssessmentNodeRequest{
-		ID:       input.ID,
-		NodeType: input.NodeType,
-		Name:     input.Name,
+		ID:         input.ID,
+		BoundaryID: boundaryID,
+		NodeType:   input.NodeType,
+		Name:       input.Name,
 	})
 	if err != nil {
 		return nil, types.UpdateRiskAssessmentNodeOutput{}, fmt.Errorf("failed to update risk assessment node: %w", err)
@@ -6930,3 +6937,106 @@ func (r *Resolver) GetRiskAssessmentScopeMermaidChartTool(ctx context.Context, r
 		MermaidChart: chart,
 	}, nil
 }
+
+func (r *Resolver) ListRiskAssessmentBoundariesTool(ctx context.Context, req *mcp.CallToolRequest, input *types.ListRiskAssessmentBoundariesInput) (*mcp.CallToolResult, types.ListRiskAssessmentBoundariesOutput, error) {
+	scope, err := r.Authorize(ctx, input.RiskAssessmentScopeID, probo.ActionRiskAssessmentBoundaryList)
+	if err != nil {
+		return nil, types.ListRiskAssessmentBoundariesOutput{}, err
+	}
+
+	pageOrderBy := page.OrderBy[coredata.RiskAssessmentBoundaryOrderField]{
+		Field:     coredata.RiskAssessmentBoundaryOrderFieldCreatedAt,
+		Direction: page.OrderDirectionDesc,
+	}
+	if input.OrderBy != nil {
+		pageOrderBy = page.OrderBy[coredata.RiskAssessmentBoundaryOrderField]{
+			Field:     input.OrderBy.Field,
+			Direction: input.OrderBy.Direction,
+		}
+	}
+
+	cursor := types.NewCursor(input.Size, input.Cursor, pageOrderBy)
+
+	p, err := r.riskManagement.ListBoundariesForScopeID(ctx, scope, input.RiskAssessmentScopeID, cursor)
+	if err != nil {
+		panic(fmt.Errorf("cannot list risk assessment boundaries: %w", err))
+	}
+
+	return nil, types.NewListRiskAssessmentBoundariesOutput(p), nil
+}
+
+func (r *Resolver) GetRiskAssessmentBoundaryTool(ctx context.Context, req *mcp.CallToolRequest, input *types.GetRiskAssessmentBoundaryInput) (*mcp.CallToolResult, types.GetRiskAssessmentBoundaryOutput, error) {
+	scope, err := r.Authorize(ctx, input.ID, probo.ActionRiskAssessmentBoundaryGet)
+	if err != nil {
+		return nil, types.GetRiskAssessmentBoundaryOutput{}, err
+	}
+
+	b, err := r.riskManagement.GetBoundary(ctx, scope, input.ID)
+	if err != nil {
+		return nil, types.GetRiskAssessmentBoundaryOutput{}, fmt.Errorf("failed to get risk assessment boundary: %w", err)
+	}
+
+	return nil, types.GetRiskAssessmentBoundaryOutput{
+		RiskAssessmentBoundary: types.NewRiskAssessmentBoundary(b),
+	}, nil
+}
+
+func (r *Resolver) AddRiskAssessmentBoundaryTool(ctx context.Context, req *mcp.CallToolRequest, input *types.AddRiskAssessmentBoundaryInput) (*mcp.CallToolResult, types.AddRiskAssessmentBoundaryOutput, error) {
+	scope, err := r.Authorize(ctx, input.RiskAssessmentScopeID, probo.ActionRiskAssessmentBoundaryCreate)
+	if err != nil {
+		return nil, types.AddRiskAssessmentBoundaryOutput{}, err
+	}
+
+	b, err := r.riskManagement.CreateBoundary(ctx, scope, riskmanagement.CreateRiskAssessmentBoundaryRequest{
+		RiskAssessmentScopeID: input.RiskAssessmentScopeID,
+		ParentBoundaryID:      input.ParentBoundaryID,
+		Name:                  input.Name,
+	})
+	if err != nil {
+		return nil, types.AddRiskAssessmentBoundaryOutput{}, fmt.Errorf("failed to create risk assessment boundary: %w", err)
+	}
+
+	return nil, types.AddRiskAssessmentBoundaryOutput{
+		RiskAssessmentBoundary: types.NewRiskAssessmentBoundary(b),
+	}, nil
+}
+
+func (r *Resolver) UpdateRiskAssessmentBoundaryTool(ctx context.Context, req *mcp.CallToolRequest, input *types.UpdateRiskAssessmentBoundaryInput) (*mcp.CallToolResult, types.UpdateRiskAssessmentBoundaryOutput, error) {
+	scope, err := r.Authorize(ctx, input.ID, probo.ActionRiskAssessmentBoundaryUpdate)
+	if err != nil {
+		return nil, types.UpdateRiskAssessmentBoundaryOutput{}, err
+	}
+
+	var parentBoundaryID **gid.GID
+	if input.ParentBoundaryID != nil {
+		parentBoundaryID = &input.ParentBoundaryID
+	}
+
+	b, err := r.riskManagement.UpdateBoundary(ctx, scope, riskmanagement.UpdateRiskAssessmentBoundaryRequest{
+		ID:               input.ID,
+		ParentBoundaryID: parentBoundaryID,
+		Name:             input.Name,
+	})
+	if err != nil {
+		return nil, types.UpdateRiskAssessmentBoundaryOutput{}, fmt.Errorf("failed to update risk assessment boundary: %w", err)
+	}
+
+	return nil, types.UpdateRiskAssessmentBoundaryOutput{
+		RiskAssessmentBoundary: types.NewRiskAssessmentBoundary(b),
+	}, nil
+}
+
+func (r *Resolver) DeleteRiskAssessmentBoundaryTool(ctx context.Context, req *mcp.CallToolRequest, input *types.DeleteRiskAssessmentBoundaryInput) (*mcp.CallToolResult, types.DeleteRiskAssessmentBoundaryOutput, error) {
+	scope, err := r.Authorize(ctx, input.ID, probo.ActionRiskAssessmentBoundaryDelete)
+	if err != nil {
+		return nil, types.DeleteRiskAssessmentBoundaryOutput{}, err
+	}
+
+	if err := r.riskManagement.DeleteBoundary(ctx, scope, input.ID); err != nil {
+		return nil, types.DeleteRiskAssessmentBoundaryOutput{}, fmt.Errorf("failed to delete risk assessment boundary: %w", err)
+	}
+
+	return nil, types.DeleteRiskAssessmentBoundaryOutput{
+		DeletedRiskAssessmentBoundaryID: input.ID,
+	}, nil
+}