Annotation to handle sanitization of field names in open types

Assemblies affected
ASP.NET Core OData 8.x

Describe the bug
There is no way to handle special characters if present in dynamic properties in OData, causing:

"The property name '01.01' is invalid; property names must not contain any of the reserved characters ':', '.', '@'."

Reproduce steps
in an IDictionary<string, object>, if the key contains a special character, on read it throws this error

Data Model

class Test {
        public string Id{ get; set; }


        //extradata
        public IDictionary<string, object> ExtraData { get; set; }
}

EDM (CSDL) Model

<edmx:Edmx xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx" Version="4.0">
<edmx:DataServices>
<Schema xmlns="http://docs.oasis-open.org/odata/ns/edm" Namespace="RY.Models">
<EntityType Name="Test" OpenType="true">
<Key>
<PropertyRef Name="Id"/>
</Key>
<Property Name="Id" Type="Edm.String" Nullable="false"/>
</EntityType>
</Schema>
</edmx:DataServices>
</edmx:Edmx>

Request/Response
N/A

Expected behavior
There needs to be, for the open type annotation, a way to specify that non-compliant field names must be sanitized before sending them out.