RPC diagnostics

HardKAS includes L1 RPC diagnostics so tools and agents can inspect runtime readiness instead of guessing.

hardkas rpc healthCheck Kaspa RPC availability.

hardkas rpc infoShow RPC connection information.

hardkas rpc doctor --endpoints a,bRun endpoint diagnostics.

hardkas rpc dagShow DAG information from node.

hardkas rpc mempool [txId]Inspect mempool status.

hardkas rpc utxos <address>Query UTXOs for an address.

The Igra L2 checks are a Lab, not part of the L1 CLI (it registers no l2 command group); hardkas dev doctor and hardkas local wizard check an Igra JSON-RPC endpoint.