4.2.0 : cardano-node-11 support

This release builds on v4.1.2 with a platform upgrade to Cardano node 11, chain-query API cleanup, and stronger integration test coverage.

Highlights

• Upgraded Kuber packages and Docker defaults to support cardano-node 11.0.1 and cardano-api ^>= 11.0.
• Added documented support for the /api/v3/era-history endpoint.
• Removed the older LocalChainQuery interface in favor of the current chain-query path used across the library, server, and client.
• Expanded integration and API test coverage around node-v11 compatibility and query behavior.

Changes

Platform and Compatibility

• Updated package constraints across the core Kuber packages for the Cardano node 11 toolchain.
• Raised the default Cardano node image in docker-compose.yml to cardano-node 11.0.1.
• Refreshed cabal configuration and build inputs required by the newer network and ledger packages.

API and Library Changes

• Added /api/v3/era-history to the published Kuber API reference docs.
• Simplified chain-query internals by removing LocalChainQuery and aligning the HTTP/client and local-node codepaths.
• Updated transaction, parser, and data-model handling for the Cardano node 11 era and import changes.

Quality

• Added shared integration test setup and broadened coverage in API, parser, and transaction tests.
• Fixed tests and supporting fixtures to match the updated query and transaction behavior.

Compatibility

• cardano-api: 11.0
• cardano-node: 11.0.1