BREAKING (feat): migrate to op-reth

[kamikazechaser]

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[Copilot]

Pull request overview

This PR performs a breaking migration of the node stack from op-geth to op-reth (celo-reth), updating the runtime entrypoint, environment/config files, Compose layouts (including archive/challenger overlays), and operational documentation to match the new execution client.

Changes:

• Replace op-geth with op-reth in docker-compose.yaml, add an op-reth startup script, and introduce op-reth tuning via reth.toml (+ archive variant).
• Update node/challenger environment variables and metrics scrape configs to point at op-reth and the challenger metrics endpoint.
• Refresh README setup and operational guidance for snapshot bootstrap, archive mode, and challenger operation.

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
start-op-reth.sh	New entrypoint script to bootstrap JWT, optionally download snapshots, and start celo-reth with appropriate flags.
reth.toml	New default celo-reth peer and throttling configuration.
reth-archive.toml	New archive-specific celo-reth peer configuration to avoid persisted pruning preset issues.
README.md	Update documentation for op-reth, snapshots, archive overlay, challenger overlay, and revised requirements.
op-succinct-challenger.env	Update challenger env to use op-reth RPC and add new challenger config knobs (incl. metrics port).
op-reth.env	New op-reth env file (chain, sequencer URL, snapshot enablement, bootnodes/trusted peers, proofs toggles).
op-node.env	Point OP node at reth engine endpoint and set engine kind to reth.
op-geth.env	Remove legacy op-geth env file.
metrics/vm/vmagent.yaml	Update scrape target/job name for op-reth metrics and add challenger scrape target.
metrics/vm/docker-compose.yaml	Rename vmagent volume to vmagentdata.
metrics/otel/otel-collector-config.example.yaml	Update OTEL scrape config for op-reth metrics path/target; add challenger scrape config.
eigenda-proxy.env	Remove commented testnet/sepolia examples; keep mainnet-focused config.
docker-compose.yaml	Swap op-geth service for op-reth; mount reth config and proofs; update ports and dependencies.
docker-compose.challenger.yaml	Update challenger image tag and expose challenger metrics port on loopback.
docker-compose.archive.yaml	New archive overlay to use separate datadir/proofs/config and set NODE_TYPE=archive.
caddy/Caddyfile	Proxy RPC/WS to op-reth instead of op-geth.
bootstrap.sh	Simplify bootstrap to directory creation for new data/proofs locations.
.gitignore	Ignore proofs + archive datadirs.

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