Add structured logging and some cleanup

• Closes - Switch all remote_dev branch log statements to ... (#408783 - closed)
• Closes - Ensure Rails structured logs are captured in pr... (#409066 - closed)

This MR does the following

• Add a new JSON logger for Remote Development which outputs at log/remote_development.log
• Remove all Rails.logger statements and replace them with the above logger
• Add Sentry tracking when an exception is raised
• Comments cleanup

Testing

See logs with:

tail -f log/remote_development.log| jq