Add !votes command, fix vote tally timing, and improve Kosmi stability

- Add !votes command (IRC + Kosmi) showing per-session and all-time vote
  breakdowns for the current game via new Jackbox API endpoints
  (GET sessions/{id}/games, sessions/{id}/votes, games/{id})
- Fix vote tally broadcasting: remove debounce timer, announce tallies
  only at game transitions or session end instead of after every vote
- Add !kreconnect IRC command to manually trigger Kosmi reconnection
- Add WebSocket ping/pong keepalive and write mutex to Kosmi client
  for connection stability
- Add watchConnection() auto-reconnect on unexpected Kosmi disconnects
- Remove old 2025-10-31 chat summaries; add votes command design doc

Made-with: Cursor

bridge/config/config.go

@@ -28,6 +28,8 @@ const (
 	EventUserTyping        = "user_typing"
 	EventGetChannelMembers = "get_channel_members"
 	EventNoticeIRC         = "notice_irc"
+	EventReconnectKosmi    = "reconnect_kosmi"
+	EventVotesQuery        = "votes_query"
 )
 
 const ParentIDNotFound = "msg-parent-not-found"