refactor: prune test-only seams and obsolete helpers (#10275)

src/application/binary/BinarySessionExecution.ts

@@ -58,7 +58,7 @@ interface PrepareSessionExecutionInput {
 }
 
 /** Recovery for an operation absent from the selected binary route. */
-export const undeclaredOperationGuidance = (
+const undeclaredOperationGuidance = (
   operation: string,
   entryCommentAvailable = false,
 ): string => {