Add ObserveException extension methods for Task and Task<T>

[Copilot]

Detached (fire-and-forget) tasks that fault produce unobserved task exceptions, which can crash the process or generate noise via TaskScheduler.UnobservedTaskException. This adds a lightweight way to explicitly suppress them when the exception cannot be meaningfully handled.

Changes

• TaskExtensions — adds ObserveException() for both Task and Task<T>, registering an OnlyOnFaulted continuation that reads t.Exception to mark it observed
• TaskExtensionsTests — covers faulted and successful cases for both task types

Usage

// Fire-and-forget task where the exception is intentionally discarded
Task.Run(() => DoSomethingAsync()).ObserveException();

[Copilot]

Pull request overview

This PR introduces ObserveException() extension methods on Task and Task<T> to explicitly observe (and thereby suppress) unobserved task exceptions for detached/fire-and-forget tasks, and adds tests intended to validate faulted and successful paths.

Changes:

• Added Task.ObserveException() and Task<T>.ObserveException() to observe t.Exception via a continuation.
• Added unit tests covering faulted and successful cases for both Task and Task<T>.
• Added additional tests intended to ensure no unobserved-task-exception behavior occurs.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
PowerKit/Extensions/TaskExtensions.cs	Adds ObserveException() overloads for Task and Task<T> via a continuation that reads t.Exception.
PowerKit.Tests/Extensions/TaskExtensionsTests.cs	Adds tests for faulted/successful cases and attempts to test unobserved-exception behavior.

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[Tyrrrz]

@copilot do we actually need separate implementations for Task/Task<T>?

[Copilot]

@copilot do we actually need separate implementations for Task/Task<T>?

No — separate implementations aren’t needed. Task<T> inherits from Task, so the Task receiver extension applies to both. I removed the duplicate generic overload in 1da1c7a.

[Tyrrrz]

@copilot please fix build errors

[Copilot]

@copilot please fix build errors

Fixed in 37220ad. The failing CS4014 warning in TaskExtensionsTests is resolved by explicitly discarding the returned task (_ = ...ObserveException()), and formatting is now clean for that file.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.18%. Comparing base (c168afd) to head (37220ad).
⚠️ Report is 1 commits behind head on prime.

Additional details and impacted files

@@            Coverage Diff             @@
##            prime      #92      +/-   ##
==========================================
+ Coverage   87.13%   87.18%   +0.05%     
==========================================
  Files          75       76       +1     
  Lines        1352     1358       +6     
  Branches      236      236              
==========================================
+ Hits         1178     1184       +6     
  Misses        122      122              
  Partials       52       52              

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