Add MSBuild TaskFactory telemetry documentation

[Copilot]

Summary

This PR adds documentation for MSBuild TaskFactory telemetry data collection to the .NET SDK and .NET CLI telemetry page.

Changes

Added two new telemetry data points to the data collection table for SDK version >=10.0.100:

1. Usage counts of MSBuild Task Factories - Tracks which Task Factories are used to load and run tasks, including:

   • Inline C# tasks
   • Multithreaded-aware tasks
   • Out-of-process tasks

2. Number of MSBuild tasks executed in TaskHosts versus not in TaskHosts - Tracks task execution context metrics

Context

The .NET SDK now collects telemetry data related to how MSBuild runs Tasks, as implemented in dotnet/dotnet#2488. This telemetry helps the team:

• Understand the usage of niche TaskHostFactory implementations
• Measure the uptake and usage of two new and evolving features:
  • .NET TaskHost
  • Multithreaded MSBuild

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Associated WorkItem: 498949

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add MSBuild TaskFactory Telemetry usage</issue_title>
<issue_description>### Type of issue

Typo

Description

In dotnet/dotnet#2488 we added collection of telemetry data related to how MSBuild runs Tasks. Specifically we're interested in

• which Task Factories are used to load and run tasks and how many times they are used
  • the different TaskFactories support different MSBuild use cases, like inline C# Tasks, MultiThreaded-aware Tasks, Our-of-Process Tasks, and so on
• How many Tasks overall are executed in TaskHosts vs not

This data will help us understand the usage of a few niche TaskHostFactory implementations, as well as help measure the uptake/usage of two new (and evolving/preview) features of MSBuild: the .NET TaskHost and Multithreaded MSBuild.

Page URL

https://learn.microsoft.com/en-us/dotnet/core/tools/telemetry

Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/tools/telemetry.md

Document Version Independent Id

50433ae5-4687-fe5f-75ab-a47e1a706777

Platform Id

315d25b4-0ae6-3fff-2eac-19afec16d9c7

Article author

@ChetHusk

Metadata

• ID: c136055b-bb04-17b6-19b2-42d4610c1a70
• PlatformId: 315d25b4-0ae6-3fff-2eac-19afec16d9c7
• Service: dotnet-fundamentals

Related Issues

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Associated WorkItem - 498949</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #48646

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Internal previews

📄 File	🔗 Preview link
docs/core/tools/telemetry.md	docs/core/tools/telemetry

[Copilot]

Pull Request Overview

This PR adds documentation for MSBuild TaskFactory telemetry data collection to the .NET SDK and .NET CLI telemetry page. The documentation describes two new telemetry data points being collected starting from SDK version 10.0.100.

Key changes:

• Added telemetry data point for MSBuild Task Factory usage tracking
• Added telemetry data point for TaskHost execution metrics