Improve docs coverage and refresh profiling parser artifacts

Add domain-specific XML documentation across src server components to satisfy CommentChecker, and update dotTrace parsing outputs used for diagnostics.

src/NATS.Server/Raft/RaftMembership.cs

@@ -27,6 +27,7 @@ public readonly record struct RaftMembershipChange(RaftMembershipChangeType Type
     /// Parses a log entry command string back into a membership change.
     /// Returns null if the command is not a membership change.
     /// </summary>
+    /// <param name="command">Serialized membership command from a replicated RAFT log entry.</param>
     public static RaftMembershipChange? TryParse(string command)
     {
         var colonIndex = command.IndexOf(':');