feat: cache incoming blocks to prevent duplication

[varun-doshi]

Fixes #251

Changes:

• Introduces a blocks_seen: LruCache<(B256, Signature)> in ScrollNetworkManager which is responsible to caching (block_hash, signature) pair
• Checks for duplicate incoming (block_hash, sig) in 2 places:
  • on_scroll_wire_event
  • handle_eth_wire_block
• If it is a duplicate block ,it will not process that further.
• If it not a duplicate block, it will add cache to two places: blocks_seen and per peer cache. Then will continue to process that block
• Note: currently cache size for block_seen is set to 100 which is same as that of the peer cache(will update this as advised)

To-do:

• punish peers who send duplicate blocks

[varun-doshi]

@jonastheis the PR is ready for review. Will proceed on peer punishment based on your advice

[jonastheis]

I think we can skip peer penalization for now as it is also not done in reth. We might also keep the same LRU size. We can always adjust later.

Then there's mainly linter errors and merge conflicts to address + some comments

[jonastheis]

@varun-doshi what's the status with this PR?

[varun-doshi]

@varun-doshi what's the status with this PR?

Apologies for the delay
I have made the corrections

[jonastheis]

lgtm!

[frisitano]

lgtm