only include the usr's latest office hours in the cours object
only include the usr's latest office hours in the cours object

tndatacommons/tndata_backend,tndatacommons/tndata_backend,tndatacommons/tndata_backend,tndatacommons/tndata_backend,izzyalonso/tndata_backend,izzyalonso/tndata_backend,izzyalonso/tndata_backend,izzyalonso/tndata_backend