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/prisma.ts

@@ -8,7 +8,7 @@ import { env } from "./env";
 
 // Add prisma to the NodeJS global type
 declare const global: {
-  prisma: PrismaClient | undefined;
+  prisma: InstanceType<typeof PrismaClient> | undefined;
 };
 
 // Connection pooling configuration