Consider a new strategy around V10

[wurmr]

V10 brings a few changes to the way dash cams work. Opening this as a placeholder.

1. It adds rear camera to the recording (4th file) so we should consider making the image larger.
2. t adds an auto clean up of sentry cam files if the disk gets too full. We should consider how this will interact with our relatively small image files.

[wurmr]

V10 creates a new directory called SentryClips. We should handle this with rsync-upload and dropbox services.