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/tournament/src/main/resources/application.yml

@@ -27,6 +27,8 @@ nowchess:
     prefix: ${REDIS_PREFIX:nowchess}
   internal:
     secret: ${INTERNAL_SECRET:123abc}
+  tournament:
+    self-url: ""
 
 mp:
   jwt:
@@ -46,6 +48,9 @@ mp:
     hibernate-orm:
       schema-management:
         strategy: update
+  nowchess:
+    tournament:
+      self-url: ${TOURNAMENT_SELF_URL:}
 
 "%test":
   quarkus: