feat: Add reproduction

.gitignore

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+dist/
+node_modules/

README.MD

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+```shell
+docker-compose up -d
+yarn install
+yarn build
+yarn run:ts-node
+yarn run:built
+docker-compose stop
+```

docker-compose.yml

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+version: "3.7"
+services:
+  db-mongo:
+    image: "public.ecr.aws/docker/library/mongo:3"
+    healthcheck:
+      test: ["CMD-SHELL", 'mongo --eval ''db.runCommand("ping").ok'' localhost:27017/test --quiet']
+      interval: 10s
+      timeout: 2s
+      retries: 10
+    ports:
+      - "27017:27017"

package.json

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+{
+  "name": "mikro-orm-nestjs-issue-128",
+  "version": "1.0.0",
+  "repository": "[email protected]:AndKiel/mikro-orm-nestjs-issue-128.git",
+  "license": "MIT",
+  "scripts": {
+    "compile": "tsc",
+    "build": "ncc build --out dist --source-map ./reproduction.ts",
+    "run:ts-node": "yarn ts-node ./reproduction.ts",
+    "run:built": "node ./dist/index.js"
+  },
+  "resolutions": {
+    "mongodb": "4.1.4"
+  },
+  "dependencies": {
+    "@mikro-orm/core": "5.7.13",
+    "@mikro-orm/mongodb": "5.7.13",
+    "@mikro-orm/nestjs": "5.2.0",
+    "@nestjs/common": "10.1.0",
+    "@nestjs/config": "3.0.0",
+    "@nestjs/core": "10.1.0",
+    "nestjs-pino": "3.3.0",
+    "pino-http": "8.3.3",
+    "reflect-metadata": "0.1.13",
+    "source-map-support": "0.5.21",
+    "tslib": "2.6.0"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "10.1.4",
+    "@nestjs/schematics": "10.0.1",
+    "@nestjs/testing": "10.0.5",
+    "@types/node": "18.16.19",
+    "@vercel/ncc": "0.36.1",
+    "ts-node": "10.9.1",
+    "typescript": "5.1.6"
+  }
+}

reproduction.ts

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+import "reflect-metadata";
+
+import { BaseEntity, Entity, PrimaryKey, SerializedPrimaryKey } from "@mikro-orm/core";
+import { EntityManager, ObjectId } from "@mikro-orm/mongodb";
+import { MikroOrmModule } from "@mikro-orm/nestjs";
+import { INestApplicationContext, Injectable, Module, Scope } from "@nestjs/common";
+import { NestFactory } from "@nestjs/core";
+import { LoggerModule, PinoLogger } from "nestjs-pino";
+
+@Entity({ collection: "entities" })
+export class MongoEntity extends BaseEntity<MongoEntity, "id"> {
+  @PrimaryKey()
+  public _id!: ObjectId;
+
+  @SerializedPrimaryKey()
+  public id!: string;
+}
+
+
+@Injectable({ scope: Scope.TRANSIENT })
+export class MongoService {
+  private entityManager: EntityManager;
+
+  constructor(entityManager: EntityManager) {
+    this.entityManager = entityManager.fork();
+  }
+}
+
+@Module({ providers: [MongoService] })
+export class MongoModule {}
+
+@Module({
+  imports: [
+    LoggerModule.forRoot(),
+    MikroOrmModule.forRootAsync({
+      inject: [PinoLogger],
+      useFactory: (logger: PinoLogger) => {
+        logger.setContext("MikroOrm");
+
+        return {
+          type: "mongo",
+          clientUrl: "mongodb://127.0.0.1:27017/dbName", // run a local dockerized MongoDB v3 instance
+          dbName: "dbName",
+          entities: [MongoEntity],
+          debug: ["query"], // Log all queries
+          logger: message => logger.info(message),
+        };
+      },
+    }),
+    MongoModule,
+  ],
+})
+class AppModule {}
+
+let applicationContext: INestApplicationContext;
+
+if (require.main === module) {
+  (async () => {
+    applicationContext = await NestFactory.createApplicationContext(AppModule);
+    applicationContext = await applicationContext.init();
+    await applicationContext.resolve(MongoService);
+    await applicationContext.close();
+    process.exit(0)
+  })().catch(async error => {
+    await applicationContext?.close();
+    throw error;
+  });
+}

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es2021",
+    "lib": ["es2021"],
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true
+  }
+}