Add monitoring / usage telemetry

[hoovercj]

Log usage and error telemetry to application insights

• Do NOT log any user information
• Only log that events are triggered or that errors occur to understand which features are being used and what problems users are facing

Backend and front end

[hoovercj]

I have just pushed an update which logs exceptions that are thrown. This is helping me to understand why certain functions are failing.

I should still add a few more events and create queries / dashboards so I can get an idea of how many people are deauthorizing the app vs signing up, how many people are turning on auto-update, how many events per day are coming through the queue, and what the major sources of failure / errors are.

This is a prerequisite for launching to the wider /r/running community