iOS aggressively throttles daemon processes, causing CADisplayLink callbacks
to be delayed or skipped. This commit implements multiple workarounds:
- Replace CADisplayLink with high-priority dispatch timer (QOS_CLASS_USER_INTERACTIVE)
- Add power assertions to prevent display/GPU/CPU throttling
- Launch daemon via SSH to localhost for better scheduler treatment
- Set real-time thread priority and ProcessType=Interactive
- Add FPS diagnostics logging to monitor capture performance
- Auto-setup passwordless SSH keys during package installation
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>