v1.9.0

Adds video review and more anonymization choices, strengthens tracking and
masking, and expands Redactly's language and video-output options.

New features

• Review detected video tracks on a timeline before encoding and exclude false
  tracks from the entire output
• Use the new built-in smiley sticker anonymization style
• Choose H.264 for broad compatibility or HEVC for smaller video files
• Use Redactly in Japanese; Japanese systems select it automatically on first
  launch, alongside the existing English and Korean options

Improvements

• Video tracks are matched more safely so masks are less likely to jump to an
  unrelated face
• Soft mask edges now blend through the padding area while keeping the detected
  region fully covered
• Korean interface wording has been polished, and the README has been
  consolidated into a single English document