feat(frontier): rename value_title to value_description in Preference

Rename title to description in InputHintOption and value_title to
value_description in Preference message for better semantic clarity.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: whoAbhishekSah

raystack/frontier/v1beta1/models.proto

@@ -522,8 +522,8 @@ message AuditLog {
 message InputHintOption {
   // Machine-readable identifier (e.g., "sq_km", "megagram")
   string name = 1;
-  // User-friendly display title (e.g., "Square Kilometers", "Megagram (Mg)")
-  string title = 2;
+  // User-friendly display description (e.g., "Square Kilometers", "Megagram (Mg)")
+  string description = 2;
 }
 
 // PreferenceTrait is a trait that can be used to add preferences to a resource
@@ -572,9 +572,9 @@ message Preference {
   // scope_id is the identifier of the scope context (e.g., organization ID)
   // Only applicable when scope_type is set
   string scope_id = 7;
-  // value_title is the human-readable display title for the value
-  // Populated from InputHintOption.title when the trait has input_options configured
-  string value_title = 8;
+  // value_description is the human-readable display description for the value
+  // Populated from InputHintOption.description when the trait has input_options configured
+  string value_description = 8;
 
   google.protobuf.Timestamp created_at = 10 [(grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {
     description: "The time when the preference was created.",