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

gateway/router.go

@@ -155,6 +155,12 @@ func (r *Router) getBridge(account string) *bridge.Bridge {
 func (r *Router) handleReceive() {
 	for msg := range r.Message {
 		msg := msg // scopelint
+		if r.handleEventReconnectKosmi(&msg) {
+			continue
+		}
+		if r.handleEventVotesQuery(&msg) {
+			continue
+		}
 		r.handleEventGetChannelMembers(&msg)
 		r.handleEventFailure(&msg)
 		r.handleEventRejoinChannels(&msg)