GraphQL Resolver Optimization

Optimize these GraphQL resolvers:

Current Schema:
```graphql
[PASTE YOUR SCHEMA]
```

Current Resolvers:
```javascript
[PASTE YOUR RESOLVER CODE]
```

Database: [PostgreSQL/MongoDB/etc.]
ORM: [Prisma/TypeORM/Mongoose/etc.]
Issues Observed: [N+1 QUERIES/SLOW RESPONSE/etc.]

Please provide:
1. N+1 query identification and fixes
2. DataLoader implementation for batching
3. Query complexity analysis setup
4. Depth limiting configuration
5. Caching strategies for resolvers
6. Performance monitoring recommendations