Incognito

New:

• Added Redis session sharing across servers, preserving aliases, masked UUIDs and coordinate offsets during transfers.
• Added web map support to hide incognito players on dynmap, BlueMap, squaremap and Pl3xMap.
• Added configurable admin notifications for incognito changes, new aliases and pending changes.
• Added /incognito messages [on|off|status] with saved join/quit message preferences.
• Added server settings to force join/quit messages to be shown or hidden, or lock player preferences.
• Added separate masking options for player chat and system messages.
• Added real UUID masking in text, supporting both dashed and compact formats.

Fix:

• Fixed alias collision checks to include sessions prepared during login.
• Added stricter alias format validation and bounded generation attempts to prevent endless loops when no alias is available.
• Improved identity masking in chat renderers, join/quit announcements, death messages and death screens.
• Limited tab completion caches and debug tracking to prevent unbounded memory growth.