feat(moderation): send ban and kick reasons to clients

[tintinhamans]

• Adds WebSocket message 46 containing the moderation action and reason.
• Sends the message before disconnecting active sessions.
• Supports !kick <user_id> [reason] in the Discord bot.
• Returns ban_reason with 423 Locked responses.
• Keeps invalid authentication responses as 401 without exposing ban details.
• Detects direct database bans within five seconds.
• Revokes all tokens when banning - kicks only disconnect the user.
• Preserves the last known ban state if database reconciliation fails.

---

Older clients ignore message 46 and retain the generic disconnect behavior.

Updated clients can display ban reasons during login or token refresh. They also handle WebSocket message 46 to show reasons for live bans and kicks. (GeneralsOnlineDevelopmentTeam/GameClient#571)