fix(orm): clear schemaCache before rebuilding registry in toJSONSchema

On a second call to toJSONSchema(), schemaRegistry.clear() emptied the
registry but @cache()-decorated builders returned their cached ZodType
without re-executing, so registerSchema() was never called and the
serialized registry was empty.

Fix by clearing schemaCache before schemaRegistry so all builders
re-execute on the subsequent eager calls and re-register their schemas.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ymc9

packages/orm/src/client/zod/factory.ts

@@ -201,7 +201,11 @@ export class ZodSchemaFactory<
      * before serialization.
      */
     toJSONSchema() {
-        // reset schema registry
+        // Reset both the registry and the builder cache so that all eager calls
+        // below re-execute their bodies and re-register schemas into the fresh registry.
+        // Without clearing schemaCache, a second call to toJSONSchema() would hit cache
+        // on every builder and never call registerSchema(), leaving the registry empty.
+        this.schemaCache.clear();
         this.schemaRegistry.clear();
 
         // Eagerly build schemas for included models so they are registered before serialization.