Implement premium features and GDPR compliance in bot and WebUI

- Added new models for premium tier configurations and assignments, enabling feature limits for free and premium users.
- Introduced GDPR deletion logging and commands for user data management.
- Enhanced logging configuration with retention days for audit logs.
- Updated bot commands and job processing to include new premium and GDPR functionalities.
- Improved localization with new keys for premium features and GDPR commands in both English and German.
- Added UI components for managing premium settings and logging retention in the WebUI.

docs/DATABASE.md

@@ -42,6 +42,16 @@ docker compose run --rm bot pnpm prisma:migrate
 pnpm prisma:generate
 ```
 
+## Premium & DSGVO
+
+- `PremiumTierConfig` (FREE/PREMIUM Limits + Feature-Flags)
+- `GuildPremiumAssignment` / `UserPremiumAssignment`
+- `GdprDeletionLog` (Protokoll der `/gdpr delete`-Läufe)
+- `GuildSettings.snipeEnabled` (Default `false`)
+- `LoggingConfig.retentionDays` (Default `90`, `0` = unbegrenzt)
+
+Migration: `20260722200000_premium_gdpr`
+
 ## Backup (automatisch)
 
 - Job: BullMQ `dailyPgDump`