Refactor codebase to async/await - `tenant serviceannouncement healthissue get` until `todo task add`

-	`tenant serviceannouncement healthissue get`
-	`tenant serviceannouncement healthissue list`
-	`tenant serviceannouncement message get`
-	`tenant serviceannouncement message list`
-	`todo list add`
-	`todo list get`
-	`todo list list`
-	`todo list remove`
-	`todo list set`
-	`todo task add`
