v1.2.1

Added

• Added a new tool, export_synapse_for_import, which can be used to do an offline import from Synapse.
  • After running this tool, use the gdpr_import tool to bring the export into the media repo.
• Added thumbnailing support for some audio waveforms (MP3, WAV, OGG, and FLAC).
• Added audio metadata (duration, etc) to the unstable /info endpoint. Aligns with MSC2380.
• Added simple thumbnailing for MP4 videos.
• Added an asAttachment query parameter to download requests per MSC2702.

Fixed

• Fixed thumbnails for invalid JPEGs.
• Fixed incorrect metrics being published when using the Redis cache.
• Fixed errors generating thumbnails when bad EXIF headers were provided.
• Use r0 instead of v1 for federation requests. No changes should be needed to configurations or routing - it'll just work.