SEC-140: Generate unified Ethereum client configuration

[huangminghuang]

Summary

• generate one shared data/ethereum-client.json during the artifact-preparation step and pass it through --outpost-ethereum-client-config-file to every batch-operator and underwriter daemon
• keep daemon argument builders pure: all filesystem writes remain inside the explicit preparation step, while create/run/restart/flow paths reuse the prepared artifact
• use the stable process-local signature-provider id eth-default; each daemon registers its own Ethereum key under that name without sharing private keys across processes
• omit transaction_policy from generated development-cluster files so nodeop applies maximum-uint256 defaults and preserves pre-policy behavior
• retain typed support for optional explicit finite policies, including canonical numeric domains and the priority-fee/max-fee relationship; total native cost remains an independent runtime cap
• leave bios and producer-only nodes without an Ethereum signing client or orphaned client-config option
• document the shared file, process-local provider semantics, and production-policy boundary

Generated configuration

{
  "version": 1,
  "clients": [
    {
      "client_id": "eth-default",
      "signature_provider_id": "eth-default",
      "rpc_url": "http://127.0.0.1:<anvil-port>",
      "chain_id": "31337"
    }
  ]
}

The omitted policy intentionally selects nodeop's maximum-value defaults. Production policy selection remains outside wire-tools-ts.

Validation

• pnpm --filter @wireio/cluster-tool build
• focused configuration/operator suites: 34 tests passed
• complete cluster-tool suite: 98 suites, 606 tests passed
• repository lint: 0 errors; 126 existing warnings
• git diff --check clean
• current-head combined flow-swap-with-underwriting with wire-sysio#531: SUCCESS (40 phases, 127 steps, 935.1s); generated ethereum-client.json omitted transaction_policy, all four operator daemons used only --outpost-ethereum-client-config-file, and both ETH→SOL and SOL→ETH settlements completed
• this repository currently reports no PR status checks

Dependency

Requires Wire-Network/wire-sysio#531 at current head for --outpost-ethereum-client-config-file and maximum-value default policies.

Jira: SEC-140