Eliminate unused `noopMetrics` and refactor `ClientMetrics` to always use the VictoriaMetrics implementation. Update associated logic to reflect these changes.
Introduce `RecordSyncDuration` for measuring sync message processing time. Update all metrics implementations (VictoriaMetrics, no-op) to support the new method. Refactor `ClientMetrics` to use `AgentInfo` for static agent data.
Integrate Netbird version into VictoriaMetrics backend and metrics labels. Update `ClientMetrics` constructor and metric name formatting to include version information.