test: better Average tests - #1168

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@v4.6.2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

XML comment has syntactically incorrect cref attribute 'IObservable{IChangeSet{TObject, TKey}}'

XML comment has syntactically incorrect cref attribute 'IObservable{IChangeSet{TObject, TKey}}'

Type parameter declaration must be an identifier not a type. See also error CS0081.

Type parameter declaration must be an identifier not a type. See also error CS0081.

XML comment has syntactically incorrect cref attribute 'IObservable{ISortedChangeSet{TObject, TKey}}'

XML comment has syntactically incorrect cref attribute 'IObservable{ISortedChangeSet{TObject, TKey}}'

Type parameter declaration must be an identifier not a type. See also error CS0081.

Type parameter declaration must be an identifier not a type. See also error CS0081.

XML comment has syntactically incorrect cref attribute 'IObservable{IChangeSet{TObject, TKey}}'