op-node: Add extended peer store to store scores

[ajsutton]

Description

Starts building an extended peer store that supports persisting peer scores. Not currently hooked up and lacking pruning of old entries, but defines the interface and has a sensible implementation for persisting scores.

Tests

Unit tests for persistence functions.

Invariants

Metadata

• https://linear.app/optimism/issue/CLI-3246/persist-peer-scores

[changeset-bot]

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Latest commit: 5a27405

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[codecov]

Codecov Report

Merging #5746 (5a27405) into develop (00cedf5) will increase coverage by 0.06%.
The diff coverage is 64.28%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5746      +/-   ##
===========================================
+ Coverage    42.01%   42.07%   +0.06%     
===========================================
  Files          448      451       +3     
  Lines        29147    29231      +84     
  Branches       877      877              
===========================================
+ Hits         12246    12300      +54     
- Misses       15956    15977      +21     
- Partials       945      954       +9     

Flag	Coverage Δ
bedrock-go-tests	39.38% <64.28%> (+0.08%)	⬆️
common-ts-tests	26.82% <ø> (ø)
contracts-bedrock-tests	53.40% <ø> (ø)
contracts-tests	98.86% <ø> (ø)
core-utils-tests	60.41% <ø> (ø)
dtl-tests	47.15% <ø> (ø)
fault-detector-tests	29.33% <ø> (ø)
sdk-tests	39.54% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
op-node/p2p/store/extended.go	57.14% <57.14%> (ø)
op-node/p2p/store/serialize.go	60.00% <60.00%> (ø)
op-node/p2p/store/scorebook.go	67.27% <67.27%> (ø)

... and 2 files with indirect coverage changes

[protolambda]

I'm going to change it to bytes.Buffer so we can merge this PR without delay and without buffer-pool risk, and can maybe land more of the work that you stacked on top. We can always optimize it in a follow-up PR.

[mergify]

This PR has been added to the merge queue, and will be merged soon.

[mergify]

This PR is next in line to be merged, and will be merged as soon as checks pass.