fix(anvil): abort blocking tasks when client disconnects #12970
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echowandere
requested review from
0xrusowsky,
DaniPopes,
grandizzy,
mattsse,
onbjerg and
zerosnacks
as code owners
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The previous attempt (#12968) didn't work because I tried to use CancellationToken, cc @mattsse pointed out that fork ops are sync and never hit await points.
Changed approach completely - now just calling abort() on the thread when the client disconnects. It's a bit harsh but it works. Added an AbortOnDrop wrapper that automatically kills the task when dropped.