Is your feature request related to a problem or challenge?

For reading Manifest/ManifestList using PyIceberg we want to have the interface as simple as possible. Therefore we want to enable reading V1 metadata (manifest-list/manifest) using a V2 reader. This is what we do today in PyIceberg, and it makes upgrading a table to a newer version much easier.

When trying to read all the manifests though Rust, I'm seeing the following error:

    @cached(cache=LRUCache(maxsize=128), key=lambda io, manifest_list: hashkey(manifest_list))
    def _manifests(io: FileIO, manifest_list: str) -> Tuple[ManifestFile, ...]:
        """Read and cache manifests from the given manifest list, returning a tuple to prevent modification."""
        bs = io.new_input(manifest_list).open().read()
        from pyiceberg_core import manifest
    
>       entries = list(manifest.read_manifest_list(bs).entries())
E       pyo3_runtime.PanicException: called `Result::unwrap()` on an `Err` value: DataInvalid => Failure in conversion with avro
E       
E       Source: Failed to deserialize Avro value into value: missing field `content`

This one refers to 517: content:

The comment sais: use 0 for all v1 manifests. Therefore we can set the default value of Avro to 0 to populate the field in the case of V1 manifest-lists.

Describe the solution you'd like

Able to read a V1 manifest-list using a V2 reader.

Willingness to contribute

None