v0.7.0 - MJPEG fix, audio improvements, crash workarounds

Critical Fixes

• MJPEG streaming now works - Fixed a bug where MJPEG frames were delivered empty (gray screen). The deframer was
  reading from the wrong buffer for MJPEG data
• SetAlternate crash workaround - Prevents crash on older Haiku versions caused by a double-free bug in
  BUSBInterface::SetAlternate()
• MJPEG size monitoring - Fixed false "bandwidth insufficient" alarms that triggered unnecessary resolution
  fallbacks
• Microdia stride quirk - Now only applies when data actually has padding, fixing diagonal line artifacts

Audio Improvements

• Fixed ReadAudioData blocking and delivery rate
• Fixed multiple race conditions in the audio ring buffer
• Proper semaphore cleanup on shutdown

New Features

• Camera Terminal relative controls (exposure, focus, zoom, pan/tilt)
• UVC Extension Unit support (SET_CUR/GET_CUR)
• Sonix LED control via BParameterWeb
• Extension Unit auto-discovery and selector probing

v0.6.0 - Improved MJPEG support and descriptor parsing

Changes since v0.5.0

Bug Fixes

• Improved VS descriptor parsing reliability - Added retry logic (up to 3 attempts with delay) for USB Video Streaming descriptor parsing. Fixes intermittent failures where cameras would fall back to hardcoded resolutions.
• Simplified audio node creation - Cleaner AudioProducer instantiation in AddOn.cpp.

Documentation

• Updated README with tested webcams and known limitations
• Added BubiCam 1280x720 MJPEG screenshot

Tested Webcams

• AUKEY PC-LM1E (1bcf:0001) - MJPEG 1280x720 @ 30fps ✓
• Microdia Motion Eye (0c45:6409) - YUY2 320x240

Installation

cp aukey_webcam_v4.media_addon /boot/home/config/non-packaged/add-ons/media/

Then restart the media server or reboot.

Requirements

• Haiku R1/beta5 or later
• libturbojpeg (for MJPEG decompression)