* only calculate time on running builds
* Add updated timestamp into database and use it in frontend
* add more trace logging
* refactor (move grpc unrelated func into related package)
* fix xorm schema
* add todo
Resolve some todos in server/model:
* Move persistent queue into its own package
* Create Types: StatusValue, SCMKind, RepoVisibly
* Rename struct Repo fields: SCMKind, IsSCMPrivate