Implement ZKP Verify Proof DTO

[llinsss]

Description

Reimplement the ZKP verify proof DTO that was deleted. This defines the data structure for verifying zero-knowledge proofs.

What was deleted

• backend/src/modules/zkp/dto/verify-proof.dto.ts: DTO for proof verification

Implementation details

• Define proof data structure
• Add validation decorators
• Document verification parameters
• Add TypeScript types
• Include example payloads

Acceptance criteria

• DTO is properly typed
• Validation rules are comprehensive
• Documentation is clear
• Follows NestJS patterns

Priority

High - Blockchain functionality

Labels

backend, blockchain, Nestjs