As raised in this community post:
we currently do not have Object flux measures that are designed to yield the total flux at an epoch when combined with a difference-image flux at that epoch; this would require photometry measured on the template coadds, which in general has different input images than the deep coadds and multi-epoch fitting algorithms. Robert Lupton and I believe PSF and aperture fluxes are probably sufficient. We should leave open the possibility that these fluxes could be measured in a way that makes them consistent with the template coadd rather than measured directly on the template coadd itself.
Computing these fluxes will not add appreciable scope to pipeline development or runtime (it's just a reconfiguration of codes we have to write and run anyway), but they should be documented in the DPDD.