Syncable Entity: Integration (Step 5/6)

Purpose: Wire everything together, register in modules, create services and resolvers.

When to use: After completing Steps 1-4 (all previous steps). Required before testing.

Quick Start

This step:

1. Registers services in 3 NestJS modules
2. Creates service layer (returns flat entities)
3. Creates resolver layer (converts flat → DTO)
4. Uses exception interceptor for GraphQL

Key principle: Services return flat entities, resolvers transpile flat → DTO.