fix: resolve CI test failures and timeouts

- Update Bun version in CI to match local version (1.2.16)
- Add bunfig.toml with 5s test timeout to prevent hanging tests
- Mock setTimeout globally in test setup to avoid timing issues
- Add NODE_ENV check to skip delays during tests
- Fix missing exports in config-encryption mock
- Remove retryDelay in tests to ensure immediate execution

These changes ensure tests run consistently between local and CI environments

.github/workflows/astro-build-test.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup Bun
         uses: oven-sh/setup-bun@v1
         with:
-          bun-version: '1.2.9'
+          bun-version: '1.2.16'
 
       - name: Check lockfile and install dependencies
         run: |