set RT limits at pro level

Author: jon-bell

supabase-pawtograder.yml

@@ -688,6 +688,8 @@ services:
       - LOG_LEVEL=error
       - RUN_JANITOR=true
       - JANITOR_INTERVAL=60000
+      - TENANT_MAX_EVENTS_PER_SECOND=500
+      - TENANT_MAX_JOINS_PER_SECOND=500
     command:
       "sh -c \"/app/bin/migrate && /app/bin/realtime eval
       'Realtime.Release.seeds(Realtime.Repo)' && /app/bin/server\"\n"