fix: restore preferred use of vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER

Prefer using vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER when available,
fallback to cached importNodeModule to prevent recursion.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ScriptedAlchemy

packages/node/src/runtimePlugin.ts

@@ -118,7 +118,9 @@ export const loadFromFs = (
           `(function(exports, require, __dirname, __filename) {${content}\n})`,
           {
             filename,
-            importModuleDynamically: importNodeModule,
+            importModuleDynamically:
+              //@ts-ignore
+              vm.constants?.USE_MAIN_CONTEXT_DEFAULT_LOADER ?? importNodeModule,
           },
         );
         script.runInThisContext()(

packages/sdk/src/node.ts

@@ -115,7 +115,10 @@ export const createScriptNode =
               `(function(exports, module, require, __dirname, __filename) {${data}\n})`,
               {
                 filename,
-                importModuleDynamically: importNodeModule,
+                importModuleDynamically:
+                  //@ts-ignore
+                  vm.constants?.USE_MAIN_CONTEXT_DEFAULT_LOADER ??
+                  importNodeModule,
               },
             );