Implement Apollo Server GraphQL API Core Endpoint

[Luluameh]

• Labels: backend, api, graphql

Description

We need a robust GraphQL API to serve the frontend client. We will implement Apollo Server (or Yoga) with TypeGraphQL/GraphQL-Tools to handle queries for experts, sessions, and active transactions.

Technical Scope & Steps

1. Setup Apollo Server in a Node.js Express application.
2. Define GraphQL type schemas (ExpertType, SessionType, ReviewType, TransactionType).
3. Implement Query Resolvers:
   • experts(category, search, limit, offset): Fetch and paginate experts.
   • expert(id): Fetch single expert details with reviews.
   • session(id): Fetch session status.
4. Implement Mutation Resolvers:
   • updateProfile(expertInput): Modify expert information (protected by wallet auth).
   • submitReview(reviewInput): Submit seeker review.

Acceptance Criteria

• GraphQL playground is accessible locally.
• Search and pagination queries return correctly sorted and sliced results.
• Unhandled query errors return clean user-facing error payloads.