Merge pull request #339 from input-output-hk/vote_delegation_cip129
feat(query): support CIP-129 vote delegation hex
feat(query): support CIP-129 vote delegation hex
Extend vote delegation parsing to handle CIP-129 fields in `QueryGroup._get_stake_addr_info`. Add `vote_delegation_cip129_hex` to `StakeAddrInfo` for storing the CIP-129 hex value. This enables richer delegation data extraction for future-proofing and compatibility.