fix(types): implement directus schema and fix envSchema export to unblock pipeline

lib/env.ts

@@ -3,12 +3,7 @@ import { validateMintelEnv, mintelEnvSchema } from '@mintel/next-utils';
 
 /**
  * Environment variable schema.
- * Extends the default Mintel environment schema which already includes:
- * - Directus (URL, TOKEN, INTERNAL_URL, etc.)
- * - Mail (HOST, PORT, etc.)
- * - Gotify
- * - Logging
- * - Analytics
+ * Extends the default Mintel environment schema.
  */
 const envExtension = {
   // Project specific overrides or additions
@@ -29,6 +24,11 @@ const envExtension = {
   INFRA_DIRECTUS_TOKEN: z.string().optional(),
 };
 
+/**
+ * Full schema including Mintel base
+ */
+export const envSchema = mintelEnvSchema.extend(envExtension);
+
 /**
  * Validated environment object.
  */