Refactor code structure for improved readability and maintainability

backend/dist/prisma/prisma.service.d.ts

@@ -0,0 +1,8 @@
+import { OnModuleDestroy, OnModuleInit } from '@nestjs/common';
+import { PrismaClient } from '@prisma/client';
+export declare class PrismaService extends PrismaClient implements OnModuleInit, OnModuleDestroy {
+    private readonly logger;
+    constructor();
+    onModuleInit(): Promise<void>;
+    onModuleDestroy(): Promise<void>;
+}