Fix enum property documentation by adding default docs using enum values

Co-authored-by: v-jiaodi <[email protected]>

Author: Copilot

packages/typespec-ts/src/modular/emitModels.ts

@@ -458,6 +458,9 @@ function emitEnumMember(
 
   if (member.doc) {
     memberStructure.docs = [member.doc];
+  } else {
+    // Provide default documentation using the enum value when no explicit doc exists
+    memberStructure.docs = [String(member.value)];
   }
 
   return memberStructure;