MicroProfile ContractVerificationClientImpl missing implementation for checkVerification and verify methods

## Description
In `ContractVerificationClientImpl.java` (MicroProfile module), two methods
throw `UnsupportedOperationException`:

- `checkVerification(ContractId)`
- `verify(ContractId, String, Map)`

The Spring module has full working implementations of both methods.

## Impact
MicroProfile users cannot verify smart contracts — both methods fail
at runtime with `UnsupportedOperationException`.

## Expected Fix
Implement both methods using JAX-RS (already available in the module),
following the same logic as the Spring implementation.

cc @hendrik.ebbers @manishdait

Start in ContractVerificationClientImpl.java in the MicroProfile module and compare checkVerification(ContractId) and verify(ContractId, String, Map) with their full implementations in the Spring module. Review the available JAX-RS usage, then confirm both methods perform contract verification without throwing UnsupportedOperationException for MicroProfile users.

Written by the indexing model from the issue text.