Feat/snapshot

[curryxbo]

Summary

• Add MPT (Merkle Patricia Trie) node support with dedicated env config, entrypoint script, and Makefile targets for hoodi/mainnet
• Bump docker images: go-ethereum 2.1.1 → 2.1.2, node 0.4.10 → 0.4.11
• Add ops/snapshot/ automation toolkit that runs on a server cron job (1st and 15th of each month) to create snapshots, upload to S3, and auto-update the README snapshot table via GitHub API

Changes

MPT Node Support (morph-node/)

• .env_mpt — MPT-specific overrides (entrypoint, fork time, snapshot names)
• entrypoint-geth-mpt.sh — geth startup script with --morph-mpt flag
• Makefile — new targets: run-hoodi-mpt-node, run-mainnet-mpt-node, run-hoodi-mpt-validator, run-mainnet-mpt-validator, download-and-decompress-hoodi-mpt-snapshot, download-and-decompress-mainnet-mpt-snapshot

Snapshot Automation (ops/snapshot/)

• snapshot_make.py — entry point: stop services → create tar snapshot → upload to S3 → restart → update README
• update_metadata.py — fetches l1_msg_start_height / derivation_start_height from indexer API, then creates a branch + pushes updated README + opens PR via GitHub REST API (no git CLI required)
• update_readme.py — in-memory README table insertion logic + Prometheus metrics output
• metrics_server.py — persistent HTTP server exposing snapshot metrics on :6060/metrics
• snapshot.env.example — configuration reference
• README.md / README.zh.md — bilingual usage documentation

Test plan

• run-hoodi-mpt-node / run-mainnet-mpt-node starts containers with MPT entrypoint
• download-and-decompress-hoodi-mpt-snapshot fetches correct snapshot name from .env_mpt
• DRY_RUN=1 python3 ops/snapshot/update_metadata.py prints metadata without touching GitHub
• python3 ops/snapshot/update_readme.py <README> inserts row correctly into target section
• metrics_server.py serves metrics on :6060/metrics after a snapshot run

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