feat: Implement stale validation cleanup and improve GitHub issue handling

- Added a scheduled task to clean up stale validation entries every hour, preventing memory leaks.
- Enhanced the `getAllValidations` function to read validation files in parallel for improved performance.
- Updated the `fetchLinkedPRs` function to use `spawn` for safer execution of GitHub CLI commands, mitigating shell injection risks.
- Modified event handling in the GitHub issues view to utilize the model for validation, ensuring consistency and reducing stale closure issues.
- Introduced a new property in the issue validation event to track the model used for validation.

apps/server/src/index.ts

@@ -48,6 +48,7 @@ import { createClaudeRoutes } from './routes/claude/index.js';
 import { ClaudeUsageService } from './services/claude-usage-service.js';
 import { createGitHubRoutes } from './routes/github/index.js';
 import { createContextRoutes } from './routes/context/index.js';
+import { cleanupStaleValidations } from './routes/github/routes/validation-common.js';
 
 // Load environment variables
 dotenv.config();
@@ -123,6 +124,15 @@ const claudeUsageService = new ClaudeUsageService();
   console.log('[Server] Agent service initialized');
 })();
 
+// Run stale validation cleanup every hour to prevent memory leaks from crashed validations
+const VALIDATION_CLEANUP_INTERVAL_MS = 60 * 60 * 1000; // 1 hour
+setInterval(() => {
+  const cleaned = cleanupStaleValidations();
+  if (cleaned > 0) {
+    console.log(`[Server] Cleaned up ${cleaned} stale validation entries`);
+  }
+}, VALIDATION_CLEANUP_INTERVAL_MS);
+
 // Mount API routes - health is unauthenticated for monitoring
 app.use('/api/health', createHealthRoutes());