Enhance live syncback process with improved reference handling and float precision

- Implemented ObjectValue carriers for service-level references, allowing for accurate serialization of non-direct child references during syncback.
- Updated `encodeService` to include explicit handling of attributes and tags, ensuring they are properly encoded and preventing data loss.
- Refactored `build_dom_from_chunks` to manage ObjectValue carriers and resolve references correctly, enhancing data integrity.
- Truncated float values to f32 precision in `UnresolvedValue::from_variant`, aligning with rbxl storage requirements and improving consistency.

These changes address critical issues in the live syncback process, enhancing reliability and data accuracy.

plugin/src/App/init.lua

@@ -642,13 +642,18 @@ function App:performSyncback()
 
 	local services = {}
 	local allChildren = {}
+	local allCarriers = {}
 	for _, className in SYNCBACK_SERVICES do
 		local ok, service = pcall(game.FindService, game, className)
 		if ok and service then
-			local chunk = encodeService(service)
+			local chunk, refTargets = encodeService(service)
 			for _, child in service:GetChildren() do
 				table.insert(allChildren, child)
 			end
+			for _, carrier in refTargets do
+				table.insert(allChildren, carrier)
+				table.insert(allCarriers, carrier)
+			end
 			table.insert(services, chunk)
 		end
 	end
@@ -658,6 +663,10 @@ function App:performSyncback()
 		data = SerializationService:SerializeInstancesAsync(allChildren)
 	end
 
+	for _, carrier in allCarriers do
+		carrier:Destroy()
+	end
+
 	local url = ("http://%s:%s/api/syncback"):format(host, port)
 	local body = Http.msgpackEncode({
 		protocolVersion = Config.protocolVersion,