v2.10.2

1. Minor bug fixes
2. Adjusted rate limit
3. Added support to centralized database connection pool
   • Use single connection pool for all hubs running under a single service
   • Enable this feature by toggling on the option --use-master-db-pool
   • --master-db-host, --master-db-user, --master-db-password, --master-db-pool-size must be provided as well
4. Added dlog_meta table for GET /dlog/list to reduce database delay
5. Added automatic discord role removal on member leave
6. Added support to modifying join timestamp
7. Fixed issue of cache not being refreshed when it is constantly being hit