Cardano Updates

The info banner sat inside the genesis() function body, so it fired once per `wb genesis <op>` dispatch

Remove the "genesis spec" workbench command that was used for `create-testnet-data --spec-*` and instead use what cardano-profile provides.

The profile may have null "conway" or "dijkstra" genesis fields but the node still needs valid files, use a "zero" genesis in those cases.

Based on a mainnet db-sync and mainnet genesis files we reconstructed the timeline with no cardano-profile implementation specifics

Going forward, the only way to inject cost models with any number of parameters is through Alonzo genesis "extraConfig" field.

- Structure: Separates cost models from the rest of the parameters.
- Consistency: Shelley genesis is the full object, no only the "protocolParams" field.
- Consistency: Uses everywhere an object for the cost model, no arrays.
- Cost model names are updated.

Were removed when the node started only considering valid what mainnet shipped with

The pool relays were wrote into the Shelley genesis (via `pool-relays.json` and `cardano-cli ... --relays` / `--relay-specification-file`) are only consumed by ledger-peer discovery.

With ledger peers off and `publicRoots` empty, the relay records in genesis are never read.

Every workbench topology disables it:
- the supervisor (local / 127.0.0.1) backend gets `useLedgerAfterSlot: -1` from `cardano-topology projection-for`.
- the Nomad backend hardcodes the same value (nix/workbench/backend/nomad-job.nix).

Was converging to `create-staked` output, keep `create-testnet-data` layout:
- pools-keys/poolN/{cold,kes,vrf,opcert}.{skey,vkey,cert,counter}
- stake-delegators/delegatorN/{payment,staking}.{skey,vkey}
- drep-keys/drepN/drep.{skey,vkey}
- utxo-keys/utxoN/utxo.{skey,vkey}
- genesis-keys/genesisN/key.{skey,vkey}
- delegate-keys/delegateN/{key,kes,vrf,opcert}.{skey,vkey,cert,counter}
- byron-gen-command/

Normalises genesis files names. Every era's genesis file is now genesis.<era>.json everywhere:
- genesis.byron.json
- genesis.shelley.json
- genesis.alonzo.json
- genesis.conway.json
- genesis.dijkstra.json

Details:
- create-testnet-data drops its symlink-creation block and the `link_keys` helper (no longer needed under the native layout).
- Removes `Massage_the_key_file_layout_to_match_AWS`, `key_depl` and `key_genesis`.

Genesis file names are unchanged here.

Replaces 'cardano-cli byron genesis genesis'.

This introduces changes to the cache output so the directory entry now has the "v2" suffix.

Removes genesis-byron-{jq,modular} and the genesis-byron dispatcher.

Default is `create-testnet-data`

Function `derive-from-cache` becomes a backend implementation.

Both `derive-from-cache` and `finalise-cache-entry` are merged and inlined into `derive-from-cache-jq` (`derive-from-cache-modular` delegates to "jq").

Resolve `$genesis_backend` once at source time and replace all the 'if WB_MODULAR_GENESIS' with a single `"X-$genesis_backend" "$@"`.

Applies to `profile-cache-key-input`, `profile-cache-key`, `spec` and `pool-relays`.

Also, the decision between `create-testnet-data` and `create-staked` (WB_CREATE_TESTNET_DATA), now lives in the "jq" backend
(the "modular" backend only implements spec, pool-relays, byron and cache key functions, not the create-testnet-data call).

Both genesis backends, "jq" and "modular", now live in the same file. Extract unmodified the code of each to new files.

Flake lock file updates:

• Updated input 'CHaP':
    'github:intersectmbo/cardano-haskell-packages/e8a483522ee73c8c9493ea6055553e5c2532e66b?narHash=sha256-ZzXz2vOhqethlqPgBExPXEnKWvaTbidsIxh5MGv%2BpwE%3D' (2026-05-02)
  → 'github:intersectmbo/cardano-haskell-packages/0aa7afd943dbcf2dc51fe652c982da281f8cb621?narHash=sha256-lipiKNOJ/NIGO/pcwQT030%2BsSgbTkP3N0w/ck5jBJlw%3D' (2026-06-10)
• Updated input 'hackageNix':
    'github:input-output-hk/hackage.nix/ba6ab6f3b781c8f308cba4fa384eafa48033f3cc?narHash=sha256-cPUF8%2Bl1ej7x4UZcuuf6IDsxU1WWmGWC0vFBH%2B6jXZk%3D' (2026-05-06)
  → 'github:input-output-hk/hackage.nix/127f92d4026a032f11f316a5a8f643266825821f?narHash=sha256-bbph19IozPdUAMInJj7rCZZQ20qv5cI7nBzRCmvtryM%3D' (2026-06-13)

* Document the limitation on the implementation of the support
  of Ogmios as a target that limits the throughput to one request
  in flight per round trip (Ogmios supports pipelining by JSON-RPC id,
  but we are not supporting it for now.

* Document that only submission goes through Ogmios:
  protocol-parameter and era queries as well as protocol startup still
  require the local node socket and config file.

* Route per-transaction rejections through the benchmark tracer instead
  of putStrLn, so they reach the trace stream like every other
  submission event instead of interleaving arbitrarily with it. The
  failure detail payload reported by Ogmios ('error.data'), which
  carries the actual ledger failure and was previously discarded, is
  included in the message along with the error code.

* Add `ogmiosUrl` to the README's connection-settings table plus a
  'Submitting through Ogmios' section, add a changelog entry for the
  feature (including the clean-exit behavior change for scripts that
  never start the benchmark machinery), and bump the package version
  to 2.17.

  Replace the hardcoded 300s worker cooldown with an optional top-level
  "cooldown_seconds" JSON field, defaulting to 0 (no wait). The cooldown
  was added to give multi-node benchmark clusters time to stabilise
  before traffic begins; for single-node ops / iterative testing it's a
  5-minute tax with no benefit. Cluster runs opt back in explicitly.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>