Disable connector transports without peer pinning

src/govoplan_files/backend/storage/backends.py

@@ -98,24 +98,24 @@ class S3StorageBackend:
 
     @property
     def client(self):
-        try:
-            import boto3
-        except ModuleNotFoundError as exc:
-            raise StorageBackendError("boto3 is required for the S3 storage backend") from exc
         try:
             endpoint_url = validate_unpinned_sdk_http_url(
                 self.endpoint_url,
                 label="File storage S3 endpoint",
             )
-            return boto3.client(
-                "s3",
-                endpoint_url=endpoint_url,
-                region_name=self.region_name,
-                aws_access_key_id=self.access_key_id,
-                aws_secret_access_key=self.secret_access_key,
-            )
         except OutboundHttpError as exc:
             raise StorageBackendError(str(exc)) from exc
+        try:
+            import boto3
+        except ModuleNotFoundError as exc:
+            raise StorageBackendError("boto3 is required for the S3 storage backend") from exc
+        return boto3.client(
+            "s3",
+            endpoint_url=endpoint_url,
+            region_name=self.region_name,
+            aws_access_key_id=self.access_key_id,
+            aws_secret_access_key=self.secret_access_key,
+        )
 
     def put_bytes(self, key: str, data: bytes, *, content_type: str | None = None) -> None:
         max_bytes = response_limit("file")