feat(tournament): federate tournaments across clusters with DB replication

- Replicate newly created tournaments to all registered remote servers,
  persisting them with originServerUrl so the remote can proxy mutations back
- Route all mutation endpoints (join/start/terminate/withdraw) through
  originServerUrl when set, instead of trying local state first
- Fix tournament event stream to proxy remote tournaments (was 404 before)
- Official bot now routes all calls through TOURNAMENT_SERVICE_URL (local
  tournament service) instead of calling remote cluster directly
- Bot parks on local account service + all registered remote servers on startup
- Add TOURNAMENT_SELF_URL env var so each cluster knows its own public URL

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

modules/official-bots/src/main/resources/application.yml

@@ -26,6 +26,8 @@ nowchess:
     prefix: nowchess
   internal:
     secret: 123abc
+  tournament:
+    service-url: http://localhost:8086
 
 "%deployed":
   quarkus:
@@ -49,3 +51,5 @@ nowchess:
       prefix: ${REDIS_PREFIX:nowchess}
     internal:
       secret: ${INTERNAL_SECRET}
+    tournament:
+      service-url: ${TOURNAMENT_SERVICE_URL:http://localhost:8086}