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/src/modules/feeds/service.ts

@@ -4,6 +4,7 @@ import { applyFeedTemplate, SocialFeedTypeSchema } from '@nexumi/shared';
 import { z } from 'zod';
 import { ensureGuild } from '../../guild.js';
 import { logger } from '../../logger.js';
+import { assertPremiumLimit, PremiumLimitError } from '../../premium.js';
 import type { BotContext } from '../../types.js';
 import { fetchFeedItems, type FeedItem, type FetchResult } from './fetchers.js';
 
@@ -49,6 +50,16 @@ export async function addFeed(
   await ensureGuild(prisma, guildId);
   const sourceId = normalizeFeedSource(input.type, input.source);
 
+  const currentCount = await prisma.socialFeed.count({ where: { guildId } });
+  try {
+    await assertPremiumLimit(prisma, guildId, 'feeds', currentCount);
+  } catch (error) {
+    if (error instanceof PremiumLimitError) {
+      throw new FeedError(error.code === 'feature_disabled' ? 'premium_feature' : 'premium_limit');
+    }
+    throw error;
+  }
+
   return prisma.socialFeed.create({
     data: {
       guildId,