feat(microprofile): NFT mirror-node queries not implemented

[alejandroGM0]

Problem

Description

The MicroProfile module's MirrorNodeClientImpl has three NFT query methods that throw
RuntimeException("Not implemented"), leaving the MicroProfile client behind the Spring one:

• queryNftsByAccount
• queryNftsByAccountAndTokenId
• queryNftsByTokenId

Additionally, MirrorNodeJsonConverterImpl#toNfts reads the wrong JSON key (transactions
instead of nfts) and throws when the nfts array is empty, causing failures even when a
valid response is returned from the Mirror Node REST API.

Steps to reproduce

1. Use the MicroProfile module with a Helidon/Quarkus application.
2. Call NftRepository#findByType, findByOwner, or findByOwnerAndType.
3. Observe RuntimeException: Not implemented at runtime.

Expected behavior

The three methods hit the Mirror Node REST API:

• GET /api/v1/accounts/{accountId}/nfts
• GET /api/v1/tokens/{tokenId}/nfts
• GET /api/v1/tokens/{tokenId}/nfts?account.id={accountId}

Results are parsed correctly, including base64-decoded NFT metadata and empty result sets.

Module

hiero-enterprise-microprofile

Additional context

The Spring module (hiero-enterprise-spring) already implements these correctly.
This is a parity gap between the two framework modules.

Solution

s

Alternatives

No response

[github-actions]

Thanks for your submission.

This issue is awaiting approval from @hiero-ledger/hiero-enterprise-java-committers and @hiero-ledger/hiero-enterprise-java-maintainers.