Protobuf to Avro

Schema registries in streaming platforms speak Avro, Protobuf, and JSON Schema, and the same 'order' concept ends up expressed in several of them. Import a single proto3 .proto file (format key protobuf, alias proto) as governed Types and Elements, then export the equivalent Avro record schema. Proto3's wire discipline that Avro has no home for, field numbers as permanent identity, presence semantics, reserved fences, is declared in the lossiness ledger, not silently dropped; conversions to JSON Schema or SQL are one more export from the same governed model.