Add join date for current staff

src/main/java/com/ffii/tsms/modules/data/service/StaffsService.kt

@@ -115,6 +115,7 @@ open class StaffsService(
         val sql = StringBuilder("select " +
                 " s.id as id, " +
                 " s.employType as employType, " +
+                " s.joinDate as joinDate, " +
                 " t.id as teamId, " +
                 " case when t.teamLead = s.id then true else false end as isTeamLead " +
                 " from staff s " +