feat(account): Mark auth_method_id as a source id for subtypes

internal/proto/controller/api/services/v1/account_service.proto

@@ -8,6 +8,9 @@ import "protoc-gen-openapiv2/options/annotations.proto";
 import "google/api/annotations.proto";
 import "google/protobuf/field_mask.proto";
 import "controller/api/resources/accounts/v1/account.proto";
+import "controller/custom_options/v1/options.proto";
+
+option (custom_options.v1.domain) = "auth";
 
 service AccountService {