feat: add repository pattern, service layer architecture, and scheduler management

- Implement repository pattern for data access layer
- Add comprehensive service layer for business logic
- Create scheduler management system with health monitoring
- Add bounded buffer utility for memory management
- Enhance security audit logging with retention policies

lib/csp.ts

@@ -389,7 +389,12 @@ export function testCSPImplementation(csp: string): {
   }>;
   overallScore: number;
 } {
-  const testResults = [];
+  const testResults: Array<{
+    name: string;
+    passed: boolean;
+    description: string;
+    recommendation?: string;
+  }> = [];
 
   // Test 1: Script injection protection
   testResults.push({