refactor: replace agent_list polling with request/response RPC pattern

packages/server/src/test-utils/vitest-setup.ts

@@ -1,3 +1,9 @@
+import path from "node:path";
+import dotenv from "dotenv";
+
+// Load repo-root .env for integration/E2E tests (OpenAI, etc.)
+dotenv.config({ path: path.resolve(process.cwd(), "../.env") });
+
 process.env.GIT_TERMINAL_PROMPT = "0";
 process.env.GIT_SSH_COMMAND = "ssh -oBatchMode=yes";
 process.env.SSH_ASKPASS = "/usr/bin/false";