  We present $griz$ photometric light curves for the full 5 years of the Dark
Energy Survey Supernova program (DES-SN), obtained with both forced Point
Spread Function (PSF) photometry on Difference Images (DIFFIMG) performed
during survey operations, and Scene Modelling Photometry (SMP) on search images
processed after the survey. This release contains $31,636$ DIFFIMG and $19,706$
high-quality SMP light curves, the latter of which contains $1635$
photometrically-classified supernovae that pass cosmology quality cuts. This
sample spans the largest redshift ($z$) range ever covered by a single SN
survey ($0.1<z<1.13$) and is the largest single sample from a single instrument
of SNe ever used for cosmological constraints. We describe in detail the
improvements made to obtain the final DES-SN photometry and provide a
comparison to what was used in the DES-SN3YR spectroscopically-confirmed SN Ia
sample. We also include a comparative analysis of the performance of the SMP
photometry with respect to the real-time DIFFIMG forced photometry and find
that SMP photometry is more precise, more accurate, and less sensitive to the
host-galaxy surface brightness anomaly. The public release of the light curves
and ancillary data can be found at https://github.com/des-science/DES-SN5YR.
Finally, we discuss implications for future transient surveys, such as the
forthcoming Vera Rubin Observatory Legacy Survey of Space and Time (LSST).
