ControlBans

fixes & additions

• added modrinth update checker — staff with controlbans.admin will be notified in-game on join if a new version is available
• fixed /unipban and /unipmute now accepting a player name instead of requiring the raw IP address
• added missing /unipmute command entirely
• fixed IP address being exposed raw in staff alerts — now masked as 192.168.*.*
• fixed IP address being broadcast publicly in unban announcements — now staff-only
• fixed silent no-op when IP banning a player with no join history — now sends a proper error message
• fixed database executor being unbounded — now capped with backpressure to prevent thread storms under load
• fixed janitor not cleaning old kicks, warnings, and resolved reports — now purges all types on schedule
• fixed MongoDB having no janitor at all — expired records were accumulating forever
• fixed /unipban tab completer returning nothing — now suggests player names
• fixed premature "Banning..." message sending before the player lookup even completes
• fixed stale javadoc in IdUtil still saying 6-character IDs