refactor: optimize issue and PR fetching by using parallel execution

- Updated the list-issues and list-prs handlers to fetch open and closed issues, as well as open and merged PRs in parallel, improving performance.
- Removed the redundant 'issues' and 'prs' properties from the result interfaces to streamline the response structure.
- Added 'skipTests' flag in integration tests to indicate tests that should be skipped, enhancing test management.

apps/server/tests/integration/services/auto-mode-service.integration.test.ts

@@ -146,6 +146,7 @@ describe('auto-mode-service.ts (integration)', () => {
         category: 'test',
         description: 'Test without worktree',
         status: 'pending',
+        skipTests: true,
       });
 
       const mockProvider = {
@@ -181,6 +182,7 @@ describe('auto-mode-service.ts (integration)', () => {
         category: 'ui',
         description: 'Execute this feature',
         status: 'pending',
+        skipTests: true,
       });
 
       const mockProvider = {
@@ -327,6 +329,7 @@ describe('auto-mode-service.ts (integration)', () => {
         category: 'test',
         description: 'Auto feature 1',
         status: 'pending',
+        skipTests: true,
       });
 
       await createTestFeature(testRepo.path, 'auto-2', {
@@ -334,6 +337,7 @@ describe('auto-mode-service.ts (integration)', () => {
         category: 'test',
         description: 'Auto feature 2',
         status: 'pending',
+        skipTests: true,
       });
 
       const mockProvider = {
@@ -520,6 +524,7 @@ describe('auto-mode-service.ts (integration)', () => {
         description: 'Feature with skip planning',
         status: 'pending',
         planningMode: 'skip',
+        skipTests: true,
       });
 
       const mockProvider = {
@@ -555,6 +560,7 @@ describe('auto-mode-service.ts (integration)', () => {
         status: 'pending',
         planningMode: 'lite',
         requirePlanApproval: false,
+        skipTests: true,
       });
 
       const mockProvider = {