feat: add lastSyncTimestamp to GetInfo rpc endpoint

[aditiharini]

Motivation

Provide more visibility into hub sync state.

Change Summary

Add lastSyncTimestamp to the GetInfo rpc endpoint.

Merge Checklist

Choose all relevant options below by adding an x now or at any time before submitting for review

• PR title adheres to the conventional commits standard
• PR has a changeset
• PR has been tagged with a change label(s) (i.e. documentation, feature, bugfix, or chore)
• PR includes documentation if necessary.
• All commits have been signed

---

PR-Codex overview

This PR introduces a new lastSyncTimestamp field to the HubInfoResponse message in various files for tracking the time of the last successful sync operation.

Detailed summary

• Added lastSyncTimestamp field to HubInfoResponse message
• Updated message.ts, server.ts, test files, and generated files
• Implemented getLastSyncTimestamp method in SyncEngine class

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[changeset-bot]

🦋 Changeset detected

Latest commit: f4fd19d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@farcaster/hub-nodejs	Minor
@farcaster/hub-web	Minor
@farcaster/hubble	Minor
@farcaster/shuttle	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
hub-monorepo	❌ Failed (Inspect)			Jun 19, 2024 2:32am

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 15 lines in your changes missing coverage. Please review.

Project coverage is 45.23%. Comparing base (1880070) to head (f4fd19d).
Report is 197 commits behind head on main.

Files	Patch %	Lines
...kages/hub-nodejs/src/generated/request_response.ts	0.00%	6 Missing and 4 partials ⚠️
...s/core/src/protobufs/generated/request_response.ts	50.00%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2071       +/-   ##
===========================================
- Coverage   74.05%   45.23%   -28.82%     
===========================================
  Files          99      140       +41     
  Lines        9425    22478    +13053     
  Branches     2097     7871     +5774     
===========================================
+ Hits         6980    10169     +3189     
- Misses       2327    10694     +8367     
- Partials      118     1615     +1497     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Wazzymandias]

At some point we should also update the peers gRPC endpoint to return the peer id per peer. Not related to this PR, just musing

[sds]

Closing due to age. If this is still relevant let's reopen and rebase. Thanks!