Accept datasource attribute on DatasourceItem, but don't process it

> When I try to explore datasources it always fail with a TypeError.
> No idea why this happens.

Exception:

  TypeError: DatasourceItem.__init__() got an unexpected keyword
  argument 'datasource'

CHANGES.rst

@@ -12,6 +12,8 @@ in progress
 - Add subcommand ``explore permissions``. Thanks, @meyerder.
 - Added support for Python 3.12
 - Removed support for Python 3.7
+- Accept ``datasource`` attribute on ``DatasourceItem``, but
+  don't process it. Thanks, @apepojken.
 
 2024-03-07 0.18.0
 =================

grafana_wtf/model.py

@@ -4,7 +4,7 @@
 import dataclasses
 import logging
 from collections import OrderedDict
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Any
 from urllib.parse import urljoin
 
 from munch import Munch
@@ -163,6 +163,15 @@ class DatasourceItem:
     type: Optional[str] = None
     url: Optional[str] = None
 
+    # The `datasource` attribute slot compensates for runtime errors reported by @apepojken.
+    # TypeError: DatasourceItem.__init__() got an unexpected keyword argument 'datasource'
+    # https://github.com/panodata/grafana-wtf/issues/110
+
+    # However, currently it is not processed. It would be good to
+    # have a data sample in order to get the implementation right.
+    # https://github.com/panodata/grafana-wtf/pull/131
+    datasource: Optional[Any] = None
+
     @classmethod
     def from_payload(cls, payload: any):
         if isinstance(payload, Munch):