Convert numeric telemetry parameters to measurements for better analytics

[Copilot]

Changes

This PR converts numeric telemetry parameters in RunTelemetry.TrackRunEvent from string properties to numeric measurements, enabling easier numeric comparisons and aggregations on the backend. Thanks to @DamianEdwards for seeing this!

Risk

Low - just changes telemetry upload patterns

Testing

tests that verify the data is flowing through the telemetry system were updated

Copilot details

What changed

The following parameters are now sent as measurements (doubles) instead of properties (strings):

• sdk_count
• package_reference_count
• project_reference_count
• additional_properties_count (file-based apps only)

Why

Telemetry measurements are specifically designed for numeric data and enable the backend analytics system to perform:

• Numeric comparisons and filters (e.g., sdk_count > 1)
• Statistical aggregations (averages, percentiles, distributions)
• Time-series analysis and trending

Previously, these values were stored as string properties, which required string-to-number conversion on the backend and limited the types of analysis that could be performed efficiently.

Example

Before:

properties["sdk_count"] = "2";
properties["package_reference_count"] = "5";
TelemetryEventEntry.TrackEvent(RunEventName, properties, measurements: null);

After:

var measurements = new Dictionary<string, double>
{
    ["sdk_count"] = 2,
    ["package_reference_count"] = 5,
};
TelemetryEventEntry.TrackEvent(RunEventName, properties, measurements);

Testing

All existing tests have been updated to verify that numeric values are now sent in the measurements dictionary instead of the properties dictionary. All 11 RunTelemetry tests pass successfully.

Fixes #<issue_number>

Original prompt

On RunTelemetry.cs:39-42, Instead of storing these parameters as event properties, they should be measurements. Making them measurements lets us do numeric comparisons more easily on the backend.

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[baronfel]

Approved over email - failing tests should just be the GenerateBundle known issue. @marcpopMSFT / @MiYanni can either of you merge on red?

[baronfel]

/ba-g GenerateBundle known issue with a fix on the way.

[baronfel]

@marcpopMSFT / @MiYanni can I get a merge on red for this one? it's approved and stuck on the generatebundle known issue stuff. Alternatively if we implement @nagilson's check then I can stop bugging y'all.

[dsplaisted]

@baronfel One of the failures looks like it may be a different issue:

gcc : error : unrecognized command-line option ‘--target=aarch64-linux-gnu’ [/datadisks/disk1/work/A8D608FB/t/dotnetSdkTests.yz4rv7NH/NativeAot_hw_---A76DA500/HelloWorldUnsupportedHostRid/HelloWorldUnsupportedHostRid.csproj]

@nagilson I saw this on another PR, do you know what that one is?

[baronfel]

@dsplaisted that's this known issue: #51049, I think @nagilson's poked some folks about relatively recent changes in Targets files that are causing this.

[nagilson]

That's fixed, but it cant be merged because generate asset bundles is still failing. If you may please update the repo config so we can merge with known issues then that fix can be merged #51084

[nagilson]

Alternatively, someone could grant me admin rights on the sdk repo 🥺

[marcpopMSFT]

Two different known issues, merging as it's approved