#876 add more metrics

[absorbb]

✅ app start / shutdown / running_time - its ok to bw used instead of start / shutdown
✅ unit initialization (destination, source, api_key, etc) success | error
✅ new unit created (destination, source, api_key, etc) success | error not needed
unit test connection (destination, source) success | error
task_executor.go: source(collection) sync run success | error | cancel | stale?
uploader.go: file processed (break by destination & table ) success | error
configurator backend auth status success | login_failed | error
open API endpoint statuses http codes - enable gin metrics for configurator (copy code from server)
✅ mail send status success | error
✅ slack notification send status success | error
✅ replay status success | error