**Revolutionary Update to Event Stream Monitoring: Now Tracking by Host!**

**New enhancements empower real-time analytics and performance insights across distributed environments, ensuring optimal event management like never before.**

Commit Details:

fix: track event stream stats by host (#2608) ## Why is this change needed? Track event stream stats by both shard and host since streams are per host. ## Merge Checklist _Choose all relevant options below by adding an `x` now or at any time before submitting for review_ - [x] PR title adheres to the [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) standard - [x] PR has a [changeset](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#35-adding-changesets) - [x] PR has been tagged with a change label(s) (i.e. documentation, feature, bugfix, or chore) - [ ] PR includes [documentation](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#32-writing-docs) if necessary. <!-- start pr-codex --> --- ## PR-Codex overview This PR enhances the `EventStreamMonitor` and `HubEventStreamConsumer` classes to track event stream statistics by `host`, improving monitoring capabilities for events processed in a distributed environment. ### Detailed summary - Added a new `host` property to `EventStreamMonitor`. - Updated the constructor of `EventStreamMonitor` to accept `host` as a parameter. - Modified methods to use `streamKey()` for generating keys. - Enhanced statistics tracking by including `host` in metrics. - Adjusted `HubEventStreamConsumer` to call `onEventProcessed` with `hubEvt`. > ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}` <!-- end pr-codex -->