refactor(ai-moderation): fix all 8 issues per review

- #2: Duplikasi contoh → single-source ALL_EXAMPLES array + formatExamples()
- #3: Hierarki evasion → Level 1 (Wajib Flag) vs Level 2 (Pilih Clean)
- #4: Dead code → remove duplicate PromptMode, cleanup
- #5: Sanitasi AI content → sanitizeAiContent() + CDATA wrapping for
      channel culture & user profile (prevents prompt injection)
- #6: Contoh personality → match actual XML format (<message>,
      <user_profile>, <content> tags instead of plain text)
- #7: Contoh invite link → example #29 added
- #8: 'Deskripsi selesai.' removed from stickerPrompt.ts
- Image analysis balance: teks = gambar (equal weight), no more bias
- Removed LGBT exclusion from SYSTEM_RULES
- Removed all template fallback language, enforce specific descriptions

services/discord-gateway/src/modules/ai-moderation/llmModerationClient.ts

@@ -13,7 +13,7 @@ import type {
 } from "../message-capture/types.js";
 import { getChannelCulture } from "./channelCultureStore.js";
 import { llmChat, llmVision } from "./llmClient.js";
-import { buildSystemPrompt as buildSystemPromptModular } from "./moderationPrompt.js";
+import { buildSystemPrompt as buildSystemPromptModular, sanitizeAiContent } from "./moderationPrompt.js";
 import { logModerationAnalysis, logModerationError } from "./responseLogger.js";
 import {
   getStickerFromCache,
@@ -830,7 +830,7 @@ async function runTextOnlyBatch(
         userProfiles.set(
           msg.user_id,
           profile
-            ? `<user_profile>${profile.profile_summary}</user_profile>`
+            ? `<user_profile>${sanitizeAiContent(profile.profile_summary)}</user_profile>`
             : "",
         );
       }
@@ -1521,7 +1521,7 @@ export async function runSimpleTextFallback(
   try {
     const profile = await getUserProfile(message.user_id);
     if (profile?.profile_summary) {
-      userProfileCtx = `\n\nProfil pengirim pesan:\n${profile.profile_summary}\n`;
+      userProfileCtx = `\n\nProfil pengirim pesan:\n${sanitizeAiContent(profile.profile_summary, 2000, false)}\n`;
     }
   } catch {
     // Profile fetch failure is non-fatal — proceed without context