feat(server): add process memory usage metrics (#13148)

close CLOUD-235

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src="https://github.com/user-attachments/assets/6ea0fd89-ab32-42e3-a675-f00f9e5856ad"
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#### PR Dependency Tree


* **PR #13148** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Introduced a new monitoring service that automatically collects and
logs process memory usage statistics every minute.
* Enhanced system monitoring capabilities by integrating a global
monitoring module.
  * Added support for a new "process" scope in metric tracking.

* **Chores**
* Improved internal module organization by including the monitoring
module in the core functionality set.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/base/metrics/metrics.ts

@@ -60,7 +60,8 @@ export type KnownMetricScopes =
   | 'ai'
   | 'event'
   | 'queue'
-  | 'storage';
+  | 'storage'
+  | 'process';
 
 const metricCreators: MetricCreators = {
   counter(meter: Meter, name: string, opts?: MetricOptions) {