Cardano Updates

Add EnableP2P to the config file. Improve message when running the custer.

Enhances the `cardano-testnet` user experience by refining startup output.

- Clearer instructions for interacting with the testnet, including
  `CARDANO_NODE_NETWORK_ID` and `CARDANO_NODE_SOCKET_PATH` exports.
- Use absolute paths in the outputs for socket path

Improve messages when running the testnet

The HTTP call fetching mainnet protocol parameters from https://github.com/input-output-hk/cardano-parameters/blob/main/mainnet/parameters.json had no retry logic, so a transient network or TLS error would kill the testnet setup with an opaque exception. Retry up to 3 times with a  2-second delay, logging each attempt to stderr, and wrap the final failure in a descriptive error.

Update node_default_config.json

The script changes to a temp directory before loading the docker
image but the artifact path from $1 is relative to the checkout root.

The HTTP call fetching mainnet protocol parameters from https://github.com/input-output-hk/cardano-parameters/blob/main/mainnet/parameters.json had no
  retry logic, so a transient network or TLS error would kill the testnet setup with an opaque exception. Retry up to 3 times with a  2-second delay, logging each attempt to stderr, and wrap the final failure in a descriptive error.

reorder error message

Add EnableP2P to the config file. Improve message when running the custer.

Enhances the `cardano-testnet` user experience by refining startup output.

- Clearer instructions for interacting with the testnet, including
  `CARDANO_NODE_NETWORK_ID` and `CARDANO_NODE_SOCKET_PATH` exports.
- Use absolute paths in the outputs for socket path

Improve messages when running the testnet

On preview, shelley_epoch=0 and the first era is Alonzo, which exposed
several assumptions that only held for mainnet's 208 Byron epochs:

- evolve_nonces: skip genesis block (no parent hash/VRF output) and
  initialize nonces lazily when None rather than only at the exact
  shelley_epoch boundary, supporting mid-epoch module startup
- epochs_state/drep_state: improve comments on initial params/txs
  consumption explaining the desync prevention
- omnibus-preview.toml: disable chain-store to avoid corrupted DB
  panic on preview genesis block

The HTTP call fetching mainnet protocol parameters from https://github.com/input-output-hk/cardano-parameters/blob/main/mainnet/parameters.json had no
  retry logic, so a transient network or TLS error would kill the testnet setup with an opaque exception. Retry up to 3 times with a  2-second delay, logging each attempt to stderr, and wrap the final failure in a descriptive error.

reorder error message

Add EnableP2P to the config file. Improve message when running the custer.

Enhances the `cardano-testnet` user experience by refining startup output.

- Clearer instructions for interacting with the testnet, including
  `CARDANO_NODE_NETWORK_ID` and `CARDANO_NODE_SOCKET_PATH` exports.
- Use absolute paths in the outputs for socket path

Improve messages when running the testnet