[Zacgoose]

This pull request introduces improved cancellation support for HTTP requests and concurrent operations throughout the codebase, ensuring that long-running or stalled operations can be reliably aborted when required (such as when a pipeline is stopped). It also updates Docker build images to use the latest .NET 10.0 SDK. The most important changes are grouped below:

Enhanced Cancellation Support

• Updated the CIPPRestClient methods (Send, SendAsync, SendConcurrent, SendConcurrentAsync, and internal helpers) to accept and propagate a CancellationToken, allowing external cancellation of HTTP requests and concurrent operations. This ensures that requests can be stopped cleanly and promptly when requested by the caller. [1] [2] [3] [4] [5] [6] [7] [8] [9]
• Updated all PowerShell cmdlets and functions that invoke CIPPRestClient methods to pass the pipeline's cancellation token ($PSCmdlet.PipelineStopToken). This ensures that user-initiated or pipeline-triggered cancellations are respected at every level. [1] [2] [3] [4] [5] [6]
• Improved resource cleanup in streaming download functions by registering disposal of HTTP clients with the pipeline's cancellation token, ensuring that stalled downloads are aborted and resources are released when the pipeline is stopped. [1] [2] [3] [4]

Testing

• Added a new test script CIPPRestClient.Cancellation.Tests.ps1 to verify that cancellation tokens correctly abort HTTP requests and concurrent operations, and that timeouts are still handled as expected.

Build Environment Updates

• Updated Dockerfiles to use the .NET 10.0 SDK (dotnet/sdk:10.0-noble) instead of 8.0, ensuring compatibility with the latest .NET features and improvements. [1] [2] [3] [4]