Apple Watch: Find a way to upload when recording has stopped

[trzy]

While the mic is recording, Apple Watch is able to upload. But when recording is stopped, as soon as the watch face goes dark, the app is effectively paused, and the upload task is frozen. We need to find a way to opportunistically upload in the background.

Ideas:

• Investigate WatchConnectivity and large/numerous file transfers. Because we save a new file every 30 seconds, there are a lot of files to transfer!
• Should we just leave the mic open (but ignoring data that comes in, so we're not actually recording) until all files are transferred (while uploads are enabled)? This is gross but is an option of last resort.