fix(#12): 리뷰 피드백 반영 - worker-auto-recovery 테스트 수정

- WorkspaceManagerInterface의 isWorktreeValid 메소드 mock 추가
- WorkerPoolManagerDependencies의 baseBranchExtractor mock 추가
- 테스트 타입 에러 해결

Author: wlgns5376

tests/unit/services/worker-auto-recovery.test.ts

@@ -81,14 +81,20 @@ describe('Worker 자동 복구 시나리오', () => {
       setupWorktree: jest.fn().mockResolvedValue(undefined),
       setupClaudeLocal: jest.fn().mockResolvedValue(undefined),
       cleanupWorkspace: jest.fn().mockResolvedValue(undefined),
-      getWorkspaceInfo: jest.fn().mockResolvedValue(null)
+      getWorkspaceInfo: jest.fn().mockResolvedValue(null),
+      isWorktreeValid: jest.fn().mockResolvedValue(true)
+    };
+
+    const mockBaseBranchExtractor = {
+      extractBaseBranch: jest.fn().mockResolvedValue('main')
     };
 
     // WorkerPoolManager 설정
     workerPoolManager = new WorkerPoolManager(config, {
       logger: mockLogger,
       workspaceManager: mockWorkspaceManager,
       stateManager: mockStateManager,
+      baseBranchExtractor: mockBaseBranchExtractor as any,
       developerConfig: {
         claude: { 
           enabled: true,