feat: implement cache layer, CSP improvements, and database performance optimizations

- Add Redis cache implementation with LRU eviction
- Enhance Content Security Policy with nonce generation
- Optimize database queries with connection pooling
- Add cache invalidation API endpoints
- Improve security monitoring performance

lib/prisma.ts

@@ -1,5 +1,8 @@
 // Enhanced Prisma client setup with connection pooling
-import { PrismaClient } from "@prisma/client";
+import pkg from "@prisma/client";
+
+const { PrismaClient } = pkg;
+
 import { createEnhancedPrismaClient } from "./database-pool";
 import { env } from "./env";