Consolidate GC logs on boot into ContainerLoadStats event

[markfields]

Description

We're trying to reduce logging overhead/noise from high event volume for consumers. These two events occur on boot and the info can be consolidated into the canonical boot event "ContainerLoadStats":

• "GCFeatureMatrix"
• "GarbageCollectorLoaded"

[agarwal-navin]

Might be simpler to expose the configs and have it serialized at logging time in Container Runtime? That way we don't have to track the same config twice here.

[markfields]

It's to prevent tampering with the configs. I didn't like exposing the config object directly

[markfields]

I guess downside of this is there's a bit of persistent memory bloat. Maybe not worth it, I guess I don't see someone having a reason to modify it or accidentally doing it. What do you think?

[agarwal-navin]

Make it a getter and readonly?

[markfields]

Yeah all the props are already readonly - it's pedantic but there's some nested objects in there which could be mucked with.

How about I switch serializedConfig to a getter that does the JSON.stringify, rather than storing the string. Since we know it's only called once.

[Copilot]

Pull request overview

This PR reduces boot-time telemetry event volume by removing GC-specific boot events and folding their data into the existing ContainerLoadStats event.

Changes:

• Added IGarbageCollector.serializedConfigs for emitting GC config telemetry without re-serializing at each call site.
• Removed the GarbageCollectorLoaded and GCFeatureMatrix telemetry events.
• Added gcConfigs to the ContainerLoadStats telemetry payload.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/runtime/container-runtime/src/gc/gcDefinitions.ts	Extends IGarbageCollector with a serialized GC-configs telemetry accessor.
packages/runtime/container-runtime/src/gc/garbageCollection.ts	Implements serializedConfigs and removes the GarbageCollectorLoaded boot event.
packages/runtime/container-runtime/src/containerRuntime.ts	Removes GCFeatureMatrix event and adds gcConfigs to ContainerLoadStats.

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