Identify pipeline entries in reports and diagnostics

internal/framework/validators/models.go

@@ -32,6 +32,8 @@ const (
 
 // Request is the runtime input shared by deterministic validators.
 type Request struct {
+	StageIndex *int    `json:"stage_index,omitempty"`
+	StageID    *string `json:"stage_id,omitempty"`
 	// ReportDiagnosticError may be called concurrently; it must not affect processing.
 	ReportDiagnosticError func(error)                            `json:"-"`
 	SectionIndex          *int                                   `json:"section_index,omitempty"`