refactor(server): import prisma from @prisma/client (#5863)

packages/backend/server/src/fundamentals/index.ts

@@ -21,7 +21,6 @@ export {
   GlobalExceptionFilter,
   OptionalModule,
 } from './nestjs';
-export { PrismaService } from './prisma';
 export { SessionService } from './session';
 export * from './storage';
 export { type StorageProvider, StorageProviderFactory } from './storage';

packages/backend/server/src/fundamentals/prisma/index.ts

@@ -3,16 +3,16 @@ import { PrismaClient } from '@prisma/client';
 
 import { PrismaService } from './service';
 
-// both `PrismaService` and `PrismaClient` can be injected
+// only `PrismaClient` can be injected
 const clientProvider: Provider = {
   provide: PrismaClient,
-  useExisting: PrismaService,
+  useClass: PrismaService,
 };
 
 @Global()
 @Module({
-  providers: [PrismaService, clientProvider],
-  exports: [PrismaService, clientProvider],
+  providers: [clientProvider],
+  exports: [clientProvider],
 })
 export class PrismaModule {}
 export { PrismaService } from './service';