refactor(workflow): simplify edge configuration

frontend/src/components/workflow/specs.ts

@@ -121,11 +121,11 @@ export type ExpressionRule = {
 
 export type WorkflowEdgeData = {
   mode: EdgeMode;
+  /** Internal route order, assigned automatically when an edge is created. */
   priority: number;
   condition?: string;
   expression?: { combinator: "and" | "or"; rules: ExpressionRule[] };
   label?: string;
-  transitionSpeech?: string;
 };
 
 export type FieldSpec = {