StatusStore migration (#14978)

* Finished!

* Typos

* Fix error

* Fix layers

* Lint: remove unnecessary use of sprint

* Fix shadowing err

app/server.go

@@ -467,7 +467,7 @@ func NewServer(options ...Option) (*Server, error) {
 	if s.Audit == nil {
 		s.Audit = &audit.Audit{}
 		s.Audit.Init(audit.DefMaxQueueSize)
-		if err := s.configureAudit(s.Audit, allowAdvancedLogging); err != nil {
+		if err = s.configureAudit(s.Audit, allowAdvancedLogging); err != nil {
 			mlog.Error("Error configuring audit", mlog.Err(err))
 		}
 	}
@@ -488,8 +488,8 @@ func NewServer(options ...Option) (*Server, error) {
 		s.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.EnableDeveloper = true })
 	}
 
-	if appErr = s.Store.Status().ResetAll(); appErr != nil {
-		mlog.Error("Error to reset the server status.", mlog.Err(appErr))
+	if err = s.Store.Status().ResetAll(); err != nil {
+		mlog.Error("Error to reset the server status.", mlog.Err(err))
 	}
 
 	if s.startMetrics && s.Metrics != nil {