* feat: support isEdited flag for SettingSwitch
* feat: add transcodeAll ffmpeg settings for extra transcoding control
* refactor: tidy up and rename current video transcoding code + transcode everything
* feat: better video transcoding with ffprobe
analyses video files to see if they are already in the desired format
allows admin to choose to transcode all videos regardless of the current format
* fix: always serve encoded video if it exists
* feat: change video codec option to a select box, limit options
removed previous video codec config option as it's incompatible with new options
removed mapping for encoder to codec as we now store the codec in the config
* feat: add video conversion job for transcoding previously missed videos
* chore: fix spelling of job messages to pluralise assets
* chore: fix prettier/eslint warnings
* feat: force switch targetAudioCodec default to aac to avoid iOS incompatibility
* chore: lint issues after rebase
