Binary Entrypoint for Historical Proof Service

[meyer9]

Describe the feature

We should add configuration flags for a basic SQLite storage provider.

Proposed flags added to op-reth node subcommand:

• --external-history: Enables the ExEx (can be implemented similar to Flashblocks).
• --external-history.storage: enum (only sqlite supported and default)
• --external-history.storage.path: optional string, required if sqlite set as storage to DB path, no default
• --external-history.window: default to 1 month based on block time of chain, or just 1,296,000 if we want to hardcode for 2s block time

Then, make the ExEx installation dependent on if --external-history flag is passed.

Additional context

No response

[emhane]

let's call these flags --op-history or --op-proofs-history or similar

[emhane]

let's go with --proofs-history since it's an op-reth subcommand