Refactor encoding logic in ChangeBatcher and improve matching depth handling

- Simplified the `isReadable` condition in `encodeService` for better readability.
- Updated the `ServiceChunk` structure to conditionally include properties and references only if they exist, enhancing data efficiency.
- Introduced a `MAX_SCORING_DEPTH` constant in the matching module to limit recursion depth, improving performance and preventing potential stack overflow issues.
- Refactored the `computePairCost` and `matchChildren` functions to incorporate the new depth parameter, ensuring accurate cost calculations during matching.

These changes enhance the clarity and efficiency of the encoding and matching processes, contributing to overall performance improvements.

plugin/src/ChangeBatcher/encodeService.lua

@@ -24,8 +24,7 @@ return function(service: Instance)
 				continue
 			end
 
-			local isReadable = propertyMeta.scriptability == "ReadWrite"
-				or propertyMeta.scriptability == "Read"
+			local isReadable = propertyMeta.scriptability == "ReadWrite" or propertyMeta.scriptability == "Read"
 			local doesSerialize = propertyMeta.serialization ~= "DoesNotSerialize"
 
 			if isReadable and doesSerialize then
@@ -66,10 +65,15 @@ return function(service: Instance)
 		end
 	end
 
-	return {
+	local chunk = {
 		className = service.ClassName,
 		data = data,
-		properties = properties,
-		refs = refs,
 	}
+	if next(properties) then
+		chunk.properties = properties
+	end
+	if next(refs) then
+		chunk.refs = refs
+	end
+	return chunk
 end