Refactor format and comment sort function

lib/archethic/transaction_chain.ex

@@ -798,6 +798,10 @@ defmodule Archethic.TransactionChain do
     conflict_resolver = fn results ->
       results
       |> Enum.sort(
+        # Prioritize more? at true
+        # then length of transaction list
+        # then regarding order, the oldest or newest transaction timestamp
+        # of the first element of the list
         &with false <- &1.more? and !&2.more?,
               false <- length(&1.transactions) > length(&2.transactions) do
           if Enum.empty?(&1.transactions) do

lib/archethic_web/controllers/api/transaction_payload.ex

@@ -49,7 +49,7 @@ defmodule ArchethicWeb.API.TransactionPayload do
 
   def to_map(%{changes: changes}, acc) do
     Enum.reduce(changes, acc, fn {key, value}, acc ->
-      value = if key == :authorizedKeys, do: format_authorized_keys(value), else: value
+      value = format_change(key, value)
 
       key = Macro.underscore(Atom.to_string(key))
 
@@ -69,7 +69,7 @@ defmodule ArchethicWeb.API.TransactionPayload do
 
   def to_map(value, _), do: value
 
-  defp format_authorized_keys(authorized_keys) do
+  defp format_change(:authorizedKeys, authorized_keys) do
     Enum.reduce(authorized_keys, %{}, fn %Ecto.Changeset{
                                            changes: %{
                                              publicKey: public_key,
@@ -81,6 +81,8 @@ defmodule ArchethicWeb.API.TransactionPayload do
     end)
   end
 
+  defp format_change(_, value), do: value
+
   defp validate_data(changeset = %Ecto.Changeset{}) do
     validate_change(changeset, :data, fn _, data_changeset ->
       case data_changeset.valid? do