feat: switch consensus client from op-node to base-consensus

[meyer9]

Summary

• Replace op-node (Go, from ethereum-optimism/optimism) with base-consensus (Rust, from base/base) as the consensus client across all execution client Docker images (reth, geth, nethermind)
• Migrate all OP_NODE_* environment variables to BASE_NODE_* equivalents; remove vars not supported by Kona (syncmode, beacon archiver, engine kind, RPC server, snapshot log)
• Consolidate versions.env to use BASE_NODE_* naming since the base repo provides multiple binaries (base-reth-node + base-consensus)

Changes

Core

• base-consensus-entrypoint (new) — replaces op-node-entrypoint, exec's ./base-consensus node with BASE_NODE_* env vars
• supervisord.conf — [program:op-node] → [program:base-consensus]
• versions.env — BASE_RETH_NODE_* → BASE_NODE_*, removed OP_NODE_* vars

Dockerfiles

• reth/Dockerfile — single Rust stage builds both base-reth-node and base-consensus from one clone, Go stage removed
• geth/Dockerfile — Go op-node stage → Rust base-consensus stage
• nethermind/Dockerfile — Go op-node stage → Rust base-consensus stage

Environment

• .env.mainnet / .env.sepolia — OP_NODE_* → BASE_NODE_*, added OP_GETH_OP_NETWORK / OP_NETHERMIND_NETWORK for clients needing string network names
• .env.sepolia-alpha — new env for chain 11763072 (gitignored)
• docker-compose.yml — updated entrypoint reference

Execution entrypoints

• reth/reth-entrypoint, geth/geth-entrypoint, nethermind/nethermind-entrypoint — auth vars updated to BASE_NODE_*

Testing

• Docker builds succeed
• Tested Reth with base-consensus and op-node

[cb-heimdall]

✅ Heimdall Review Status

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[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions]

This pull request was closed because it has been inactive for 5 days since being marked as stale.

[danyalprout]

@refcell should this be chain-id or a named chain? pretty sure we support base-sepolia here?

[meyer9]

ah this does work. Just tested locally. I think I started with sepolia-alpha which doesn't work, but base-sepolia and base both work

[meyer9]

50efd3a