Refactor send logic to use senderPlayerIndex and optimize content chunking

metrics-combinator.lua

@@ -158,8 +158,12 @@ function SendCombinatorMetrics()
                 local greenNet = entity.get_circuit_network(defines.wire_connector_id.circuit_green)
                 if redNet then
                     for _, signal in pairs(redNet.signals) do
+                        local quality = "-normal"
+                        if signal.signal.quality then
+                            quality = signal.signal.quality.name
+                        end
                         netParts[#netParts + 1] = ("%s:red:%s:%d"):format(combinatorFlags.name,
-                            signal.signal.name .. signal.signal.quality.name, signal.count)
+                            signal.signal.name.."-"..quality, signal.count)
                     end
                 end
                 if greenNet then