🤖 ci: increase jest workers in CI

Integration tests are largely network/IO bound (LLM calls). Using 4 Jest workers in CI helps keep the suite under the 10-minute job timeout by overlapping waits.

Author: ammar-agent

jest.config.js

@@ -23,7 +23,7 @@ module.exports = {
   // Run tests in parallel (use 50% of available cores, or 4 minimum)
   // CI runners often have a low core count; "50%" can result in a single Jest worker,
   // which can push the integration job over its 10-minute timeout.
-  maxWorkers: process.env.CI ? 2 : "50%", 
+  maxWorkers: process.env.CI ? 4 : "50%",  
   // Force exit after tests complete to avoid hanging on lingering handles
   forceExit: true,
   // 10 minute timeout for integration tests, 10s for unit tests