refactor: switch to process.env for all packages, fix typos

vitest.config.evals.ts

@@ -1,4 +1,8 @@
 import { defineConfig } from "vitest/config";
+import dotenv from "dotenv";
+
+// Load environment variables for evals at test process startup
+dotenv.config();
 
 export default defineConfig({
   test: {