add class attributes to model constructor

src/regmod/models/binomial.py

@@ -255,3 +255,7 @@ def create_binomial_model(data: Data, **kwargs) -> BinomialModel:
     if params[0].inv_link.name == "expit":
         return CanonicalBinomialModel(data, params=params)
     return BinomialModel(data, params=params)
+
+
+for key in ["param_names", "default_param_specs"]:
+    setattr(create_binomial_model, key, getattr(BinomialModel, key))

src/regmod/models/gaussian.py

@@ -224,3 +224,7 @@ def create_gaussian_model(data: Data, **kwargs) -> GaussianModel:
     if params[0].inv_link.name == "identity":
         return CanonicalGaussianModel(data, params=params)
     return GaussianModel(data, params=params)
+
+
+for key in ["param_names", "default_param_specs"]:
+    setattr(create_gaussian_model, key, getattr(GaussianModel, key))

src/regmod/models/poisson.py

@@ -222,3 +222,7 @@ def create_poisson_model(data: Data, **kwargs) -> PoissonModel:
     if params[0].inv_link.name == "exp":
         return CanonicalPoissonModel(data, params=params)
     return PoissonModel(data, params=params)
+
+
+for key in ["param_names", "default_param_specs"]:
+    setattr(create_poisson_model, key, getattr(PoissonModel, key))