Add metadata to mapped_column for inclusion in MappedAsDataclass #10674
Description
Discussed in #10536
Originally posted by notmatthancock October 24, 2023
Dataclasses fields allow a metadata dictionary (see here). It would be useful if this was available in mapped_column that gets inserted as normal metadata in the respective dataclass field when the MappedAsDataclass mixin is used.
to avoid confusion with the sqlalchemy metadata, the best bane for it is probably dataclass_metadata