[v9.3.x] Chore: Fix SQLx failure when starting the server with newDBLibrary enabled (#59054)

Chore: Fix SQLx failure when starting the server with newDBLibrary enabled (#58985)

change the weekstart to pointer

Co-authored-by: Sofia Papagiannaki <1632407+papagian@users.noreply.github.com>
(cherry picked from commit ba8124ef93)

Co-authored-by: ying-jeanne <74549700+ying-jeanne@users.noreply.github.com>

pkg/api/preferences.go

@@ -82,12 +82,17 @@ func (hs *HTTPServer) getPreferencesFor(ctx context.Context, orgID, userID, team
 		}
 	}
 
+	weekStart := ""
+	if preference.WeekStart != nil {
+		weekStart = *preference.WeekStart
+	}
+
 	dto := dtos.Prefs{
 		Theme:            preference.Theme,
 		HomeDashboardID:  preference.HomeDashboardID,
 		HomeDashboardUID: dashboardUID,
 		Timezone:         preference.Timezone,
-		WeekStart:        preference.WeekStart,
+		WeekStart:        weekStart,
 	}
 
 	if preference.JSONData != nil {