bug(medcat): CU-869b36xv7 Avoid meta cat issue when getting model card (#217)

* CU-869b36xv7: Avoid import error when getting model card

* CU-869b36xv7: Fix minor typing issue

Author: mart-r

medcat-v2/medcat/cat.py

@@ -910,11 +910,19 @@ def get_model_card(self, as_dict: bool = False) -> Union[str, ModelCard]:
         Returns:
             Union[str, ModelCard]: The model card.
         """
-        from medcat.components.addons.meta_cat import MetaCATAddon
-        met_cat_model_cards = [
-            mc.mc.get_model_card(True) for mc in
-            self.get_addons_of_type(MetaCATAddon)
-        ]
+        has_meta_cat = True
+        try:
+            from medcat.components.addons.meta_cat import MetaCATAddon
+        except MissingDependenciesError:
+            has_meta_cat = False
+        met_cat_model_cards: list[dict]
+        if has_meta_cat:
+            met_cat_model_cards = [
+                mc.mc.get_model_card(True) for mc in
+                self.get_addons_of_type(MetaCATAddon)
+            ]
+        else:
+            met_cat_model_cards = []
         cdb_info = self.cdb.get_basic_info()
         model_card: ModelCard = {
             'Model ID': self.config.meta.hash,