Add MSBuild TaskFactory telemetry documentation (#49380)

* Initial plan

* Add MSBuild TaskFactory telemetry documentation

Co-authored-by: meaghanlewis <[email protected]>

* Refine telemetry documentation for MSBuild Task Factories usage and execution counts

* Update docs/core/tools/telemetry.md

Co-authored-by: Copilot <[email protected]>

* Update docs/core/tools/telemetry.md

Co-authored-by: Genevieve Warren <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: meaghanlewis <[email protected]>
Co-authored-by: Meaghan Osagie <[email protected]>
Co-authored-by: Copilot <[email protected]>
Co-authored-by: Chet Husk <[email protected]>
Co-authored-by: Genevieve Warren <[email protected]>

Author: 5 people

docs/core/tools/telemetry.md

@@ -121,6 +121,8 @@ The telemetry feature collects the following data:
 | >=10.0.100    | Whether MSBuild was used for file-based apps with `dotnet run`. |
 | >=10.0.100    | Whether Roslyn compiler was used for file-based apps with `dotnet run`. |
 | >=10.0.100    | The detected LLM agent name if the CLI was invoked from an LLM agent. For more information, see [LLM detection](#llm-detection).|
+| >=10.0.100    | Which MSBuild task factories are used to load and run tasks (including inline C# tasks, multithreaded-aware tasks, and out-of-process tasks), and how many tasks they execute. |
+| >=10.0.100    | Number of MSBuild tasks executed in TaskHosts versus tasks not executed in TaskHosts. |
 
 ### Collected options