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.

apps/bot/prisma/schema.prisma

@@ -62,6 +62,8 @@ model GuildSettings {
   locale            String   @default("de")
   timezone          String   @default("Europe/Berlin")
   moderationEnabled Boolean  @default(true)
+  /// Snipe/editsnipe storage and commands (SPEC: default off for privacy).
+  snipeEnabled      Boolean  @default(false)
   guild             Guild    @relation(fields: [guildId], references: [id], onDelete: Cascade)
 }
 
@@ -209,6 +211,8 @@ model LoggingConfig {
   ignoreBots         Boolean  @default(true)
   ignoredChannelIds  String[] @default([])
   ignoredRoleIds     String[] @default([])
+  /// Days to keep Case / dashboard audit rows; 0 = keep forever.
+  retentionDays      Int      @default(90)
   createdAt          DateTime @default(now())
   updatedAt          DateTime @updatedAt
   guild              Guild    @relation(fields: [guildId], references: [id], onDelete: Cascade)
@@ -881,3 +885,50 @@ model OwnerAuditLog {
   @@index([createdAt])
 }
 
+/// Per-tier limits and feature gates (FREE / PREMIUM). Seeded on first use.
+model PremiumTierConfig {
+  tier         String   @id
+  maxTags      Int
+  maxFeeds     Int
+  maxBackups   Int
+  /// JSON object of feature key → boolean (tags, feeds, guildbackup, …).
+  features     Json
+  updatedAt    DateTime @updatedAt
+}
+
+model GuildPremiumAssignment {
+  id           String    @id @default(cuid())
+  guildId      String    @unique
+  tier         String
+  note         String?
+  assignedById String
+  expiresAt    DateTime?
+  createdAt    DateTime  @default(now())
+  updatedAt    DateTime  @updatedAt
+
+  @@index([tier])
+}
+
+model UserPremiumAssignment {
+  id           String    @id @default(cuid())
+  userId       String    @unique
+  tier         String
+  note         String?
+  assignedById String
+  expiresAt    DateTime?
+  createdAt    DateTime  @default(now())
+  updatedAt    DateTime  @updatedAt
+
+  @@index([tier])
+}
+
+model GdprDeletionLog {
+  id        String   @id @default(cuid())
+  userId    String
+  guildId   String?
+  summary   Json?
+  createdAt DateTime @default(now())
+
+  @@index([userId, createdAt])
+}
+