Use ConfigureAwaitOptions.SuppressThrowing in GameLink.DisposeAsync for async cleanup

[Copilot]

Closes #431

Implementation in progress.

[sliekens]

@copilot The previous session was interrupted before you made any code changes. Please implement the changes now, following the steps and acceptance criteria in the PR description above.

---

Generated by Claude Code

[Copilot]

@copilot The previous session was interrupted before you made any code changes. Please implement the changes now, following the steps and acceptance criteria in the PR description above.

---...

I've implemented the changes. The codebase audit found no existing try/catch (OperationCanceledException) patterns around async cleanup operations. However, I identified GameLink.DisposeAsync() as an appropriate candidate for using ConfigureAwaitOptions.SuppressThrowing:

Changes made:

• Line 58: timer.DisposeAsync() now uses SuppressThrowing (converted via .AsTask() since ValueTask doesn't support ConfigureAwaitOptions directly)
• Line 84: tcs.Task now uses SuppressThrowing for the pre-NET fallback path

Both are in the disposal path where exceptions (e.g., from cancellation) should not prevent subsequent cleanup operations (notifying subscribers, disposing mumbleLink, setting disposed flag).

The project builds successfully across all target frameworks (net9.0, net8.0, netstandard2.0, net462). Commit: 0aa31c7

[sliekens]

@copilot The ConfigureAwaitOptions.SuppressThrowing adoption looks correct. This PR has a packages.lock.json conflict with main (older ILLink.Tasks versions). Please rebase onto main so the lockfiles are up to date.

---

Generated by Claude Code