fix resolution in metadata for sd3

library/sai_model_spec.py

@@ -216,7 +216,7 @@ def build_metadata(
             reso = (reso[0], reso[0])
     else:
         # resolution is defined in dataset, so use default
-        if sdxl:
+        if sdxl or sd3 is not None:
             reso = 1024
         elif v2 and v_parameterization:
             reso = 768