Refactor code structure and dependencies

src/middlewares/prisma-context.middleware.ts

@@ -0,0 +1,12 @@
+import { Injectable, NestMiddleware } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+
+@Injectable()
+export class PrismaContextMiddleware implements NestMiddleware {
+  constructor(private readonly prisma: PrismaService) {}
+
+  use(req: any, res: any, next: () => void) {
+    req.prisma = this.prisma; // Attach Prisma client to request object
+    next();
+  }
+}