Add newtype deserialization for Json(_) for parity with Cbor(_).

Signed-off-by: Jason Volk <jason@zemos.net>

src/database/de.rs

@@ -272,6 +272,12 @@ fn deserialize_newtype_struct<V>(self, name: &'static str, visitor: V) -> Result
 	{
 		match name {
 			| "$serde_json::private::RawValue" => visitor.visit_map(self),
+			| "Json" => visitor
+				.visit_newtype_struct(&mut serde_json::Deserializer::from_slice(
+					self.record_trail(),
+				))
+				.map_err(|e| Self::Error::SerdeDe(format!("{name}: {e}").into())),
+
 			| "Cbor" => visitor
 				.visit_newtype_struct(&mut minicbor_serde::Deserializer::new(self.record_trail()))
 				.map_err(|e| Self::Error::SerdeDe(format!("{name}: {e}").into())),

src/database/ser.rs

@@ -52,7 +52,7 @@ pub(crate) struct Serializer<'a, W: Write> {
 }
 
 /// Newtype for JSON serialization.
-#[derive(Debug, Serialize)]
+#[derive(Debug, Deserialize, Serialize)]
 pub struct Json<T>(pub T);
 
 /// Newtype for CBOR serialization.