Add a model card: held-out evaluation and guidance for the eligible scans
This adds a README model card for winding_model_9um, which has the checkpoint and training metrics but no card. Because the released metrics were logged on training batches, the card adds held-out numbers from an independent evaluation that runs villa's own dataset and metric code (https://github.com/damsolanke/winding-model-eval).
It also covers the 22 prize-eligible volumes. The 9.362 um scans can be read as they are. For the 8.64 um scans, resampling to about 9.6 um avoids a measured rise in count error: +0.036 per column on the eligible-protocol scan of PHerc0139 read at 8.64 um, and +0.025 on the real 8.64 um scan of PHerc0343.
Items the checkpoint does not record, such as the license, the scroll mix and the process count, are marked "not stated" for you to fill in or remove. Edits welcome.