Add context user on speaker stats

resources/prosody-plugins/mod_speakerstats_component.lua

 local SpeakerStats = {};
 SpeakerStats.__index = SpeakerStats;
 
-function new_SpeakerStats(nick)
+function new_SpeakerStats(nick, context_user)
     return setmetatable({
         totalDominantSpeakerTime = 0;
         _dominantSpeakerStart = 0;
         nick = nick;
+        context_user = context_user;
         displayName = nil;
     }, SpeakerStats);
 end
 function occupant_joined(event)
     local room = event.room;
     local occupant = event.occupant;
+
     local nick = jid_resource(occupant.nick);
 
     if room.speakerStats then
             room:route_stanza(stanza);
         end
 
-        room.speakerStats[occupant.jid] = new_SpeakerStats(nick);
+        local context_user = event.origin and event.origin.jitsi_meet_context_user or nil;
+        room.speakerStats[occupant.jid] = new_SpeakerStats(nick, context_user);
     end
 end
 
     prosody.events.add_handler("host-activated", process_host);
 else
     process_host(muc_component_host);
-end
+end