Fix AudioDeviceManager destructor race on midiCallbackLock

[Copilot]

midiCallbackLock is declared after enabledMidiInputs in the header, so it's destroyed first. A live MIDI input callback can then access the already-destroyed CriticalSection, causing EXCEPTION_ACCESS_VIOLATION_WRITE in RtlEnterCriticalSection.

Change

• yup_AudioDeviceManager.cpp: explicitly call enabledMidiInputs.clear() at the top of ~AudioDeviceManager(), ensuring all MIDI inputs are torn down while midiCallbackLock is still valid.

AudioDeviceManager::~AudioDeviceManager()
{
    enabledMidiInputs.clear();   // ← added; must happen before midiCallbackLock is destroyed
    currentAudioDevice.reset();
    defaultMidiOutput.reset();
}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.50%. Comparing base (1a531a6) to head (525547e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
+ Coverage   78.49%   78.50%   +0.01%     
==========================================
  Files         605      605              
  Lines       60548    60549       +1     
==========================================
+ Hits        47525    47537      +12     
+ Misses      13023    13012      -11     

Files with missing lines	Coverage Δ
..._audio_devices/audio_io/yup_AudioDeviceManager.cpp	72.03% <100.00%> (+0.04%)	⬆️

... and 6 files with indirect coverage changes

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