:sig String ucb_encode(DValue value) :see ucb_decode 0_DValue json_encode :content Serializes a `DValue` to UCEB1, UCE's binary DValue wire format for the WASM membrane and future cross-instance calls. UCEB1 is length-prefixed and binary-safe. It preserves nested maps, list-shaped maps, empty lists, and scalar bytes, including embedded NUL bytes. Use JSON/YAML/XML serializers for human-facing formats; use UCEB1 when UCE code needs the native DValue protocol. :example DValue original; original["msg"] = "hello"; String packed = ucb_encode(original); print("encoded ", packed.length(), " bytes; round-trips to: ", ucb_decode(packed)["msg"].to_string(), "\n");