fix(workflows-sdk): use loaded modules when container is empty (#7422)

packages/modules/link-modules/src/utils/generate-schema.ts

@@ -32,11 +32,7 @@ export function generateGraphQLSchema(
 
   for (const extend of joinerConfig.extends ?? []) {
     const extendedModule = MedusaModule.getModuleInstance(extend.serviceName)
-    if (
-      !isReadOnlyLink &&
-      !extendedModule &&
-      !extend.relationship.isInternalService
-    ) {
+    if (!extendedModule) {
       throw new Error(
         `Module ${extend.serviceName} not found. Please verify that the module is configured and installed, also the module must be loaded before the link modules.`
       )