Another retention question: the file

_lakefs/retention/gc/rules/config.json

is not a JSON file. What format is it? protobuf?? Here's a hexdump of one that I have right now:

00000000  08 05 12 08 0a 04 6d 61  69 6e 10 06              |......main..|

protobuf

Yup, decoding in

GarbageCollectionManager.GetRules

uses this:

rulesBytes, err := io.ReadAll(reader)
	if err != nil {
		return nil, err
	}
	err = proto.Unmarshal(rulesBytes, &rules)
	if err != nil {
		return nil, err
	}

Grrr...