Iroha Core Enhances Signature Clarity and Developer Tools

The recent updates include a significant enhancement in the representation of signatures within the data model, where the BlockSignature and ViewChangeProofSignature types were transformed from tuple structs to named-field structs. This change improves code readability and maintainability, facilitating easier access to signature components. While internal, it’s a beneficial refinement prompted by code review feedback, and clients should update their references accordingly. A useful addition is the introduction of a proper constructor for LiveQueryStoreHandle, simplifying the creation process and improving usability for developers and testers. The SignedBlock structure now exposes its transaction list directly, providing easier and cleaner access for developers and tools such as block explorers, increasing transparency. Other miscellaneous code cleanups include replacing unstable cryptography methods with stable alternatives, ensuring future compatibility and cleaner builds. In testing, a new unit test was added to verify the correct handling of invalid asset IDs during asset transfers, thus strengthening error handling and system robustness. Overall, these updates prioritize code clarity, developer convenience, and system reliability.