Add file system sync delays for CI reliability

- Add 100ms delay after execSync in tests to allow file system to sync
- This addresses timing issues where files are created but not immediately visible in CI
- Fixes both nextjs-15 generation test and backup test failures

Author: Matt-Dionis

claude-config-composer/tests/integration/cli.test.ts

@@ -72,6 +72,9 @@ describe('CLI Integration Tests', () => {
 
       expect(result).toContain('Configuration generated in');
 
+      // Add delay for CI file system sync
+      await new Promise(resolve => setTimeout(resolve, 100));
+
       // Check that .claude directory was created
       const claudeDir = path.join(testDir, '.claude');
       expect(fsSync.existsSync(claudeDir)).toBe(true);
@@ -138,6 +141,9 @@ describe('CLI Integration Tests', () => {
 
       expect(result).toContain('Configuration generated in');
 
+      // Add delay for CI file system sync
+      await new Promise(resolve => setTimeout(resolve, 100));
+
       // Check that backup was created
       const files = await fs.readdir(testDir);
       const backupDir = files.find(f => f.startsWith('.claude.backup-'));