test(glmt): increase timeout for retry-logic tests on CI

The GLMT retry logic tests use dynamic imports and GlmtProxy
instantiation which are slower on CI runners than locally.
Increase default timeout from 5s to 30s to prevent flaky failures.

tests/unit/glmt/retry-logic.test.ts

@@ -4,7 +4,10 @@
  * Tests for exponential backoff retry behavior on 429 rate limit errors
  */
 
-import { describe, it, expect, beforeEach, afterEach } from 'bun:test';
+import { describe, it, expect, beforeEach, afterEach, setDefaultTimeout } from 'bun:test';
+
+// Increase timeout for CI - dynamic imports and proxy creation are slow on CI runners
+setDefaultTimeout(30000);
 
 // Store original env vars
 const originalEnv = { ...process.env };