Catch retry errors, i.e. when a metadata service fails (#918)

Author: mskarlin

paperqa/clients/client_models.py

@@ -14,6 +14,7 @@
     field_validator,
     model_validator,
 )
+from tenacity import RetryError
 
 from paperqa.types import DocDetails
 
@@ -116,6 +117,12 @@ async def query(self, query: dict) -> DocDetails | None:
                 f" {client_query.doi if isinstance(client_query, DOIQuery) else client_query.title} in"
                 f" {self.__class__.__name__}."
             )
+        except RetryError:
+            logger.warning(
+                "Metadata service is down for"
+                f" {client_query.doi if isinstance(client_query, DOIQuery) else client_query.title} in"
+                f" {self.__class__.__name__}."
+            )
         except TimeoutError:
             logger.warning(
                 f"Request to {self.__class__.__name__} for"