JsonRawValue

Concrete JSON-string instantiation of the leaf codec bridge. The generic engine keeps Raw abstract; this object is the test/transport seam where Raw = String (JSON). Mirrors commons' codec-based encoding living in a raw-RPC companion's implicits object: a leaf AsRaw/AsReal pair derived from the value codec, here halotukozak.mcodec.MCodec standing in for GenCodec.