feat(SPV-1085) merkle roots verifier

[chris-4chain]

AI generated summary

BHS Integration:

• config/check_block_header_service.go: Updated imports and response models to use chainmodels instead of chainstate for BHS integration. [1] [2]
• config/services.go: Added BHS configuration options to the loadSPVWallet function.
• engine/chain/chain_service.go: Added BHS service to the chainService struct and updated the NewChainService function to include BHS configuration.

Error Handling:

• engine/chain/errors/bhs_errors.go: Introduced new error types specific to BHS, such as ErrBHSUnreachable, ErrBHSNoSuccessResponse, ErrBHSUnauthorized, ErrBHSBadRequest, and ErrBHSUnhealthy.

Interface Updates:

• engine/chain/interface.go: Added BHSService interface and included it in the main Service interface.

Tests and Mocking:

• engine/chain/internal/bhs/bhs_mock_test.go: Added mock tests for BHS verification.
• engine/chain/internal/bhs/healthcheck_test.go: Added tests for BHS health checks.

These changes ensure that the Block Header Service is properly integrated and that the system can handle various BHS-related errors effectively.

Pull Request Checklist

• [ ] 📖 I created my PR using provided : CODE_STANDARDS
• [ ] 📖 I have read the short Code of Conduct: CODE_OF_CONDUCT
• [ ] 🏠 I tested my changes locally.
• [ ] ✅ I have provided tests for my changes.
• [ ] 📝 I have used conventional commits.
• [ ] 📗 I have updated any related documentation.
• [ ] 💾 PR was issued based on the Github or Jira issue.