Feat/sep 12 kyc

[Vivian-04]

PR #10 Backend: SEP-12 (KYC) Basic Data Model & Service

Description

This PR implements the foundational data model and backend service for managing Stellar Ecosystem Proposal 12 (KYC), as requested in the issue

The implementation enables robust customer identity management and status tracking (PENDING, ACCEPTED, REJECTED) while keeping the logic independent of the core transaction engine to avoid state conflicts.

Key Features

• Database Schema:
  • Introduced the KycCustomer model linked to the existing User.
  • Added a KYCStatus enum for standardized lifecycle management.
• KYC Service:
  • getKycStatus: Retrieves a user's current identity verification state.
  • submitKycData: Handles new identity submissions and updates (upsert logic).
  • adminUpdateStatus: Administrative utility for manual approval or rejection of KYC applications.
• Quality Assurance:
  • Full test suite in kyc.service.test.ts covering success paths, error handling, and data integrity.
  • Resolved Prisma casing issues to ensure consistent camelCase access throughout the TypeScript codebase.

Implementation Details

• Backend Path: src/services/kyc.service.ts
• Model: KycCustomer (mapped to kycCustomer in Prisma Client)

Verification

I have confirmed the implementation by running the full backend test suite and the linter. All tests passed, and the Prisma client was successfully regenerated to support the new model.

Closes #10

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[Ceejaytech25]

@Vivian-04 , pls resolve conflict

[Vivian-04]

Kindly confirm..Thankss