refactor: comprehensive codebase cleanup and architecture hardening

- Sprint 1 (Quick Wins): Remove dead analytics modules, fix 4 unresolved
  imports, replace 3 console.warn with logger, remove mock-crc import
- Sprint 2 (Architecture): Create MascotChatRepository, AnalysisRepository,
  3 Zod schemas (mascot-chat, analysis, voice), deduplicate error classes,
  move 3 SQL queries from routes to repository
- Sprint 3 (Complexity): Replace 7 any types with proper interfaces,
  extract 6 helpers from prepareMediaMessage (CC 85 -> ~15)
- Sprint 4 (Config): Remove 22 dead env vars from .env, add 30 missing
  vars to .env.example, standardize naming

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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

@@ -7,7 +7,6 @@ import { LRUCache } from "lru-cache";
 import { Piscina } from "piscina";
 import { config } from "../../shared/config/config.js";
 import type { EventBroadcaster } from "../event-broadcaster/index.js";
-import { invalidateAnalyticsCache } from "../message-capture/analyticsStore.js";
 import { isAgeRestrictedMetadata } from "../message-capture/messageMetadata.js";
 import {
   getConversationKeysWithIncompleteAnalysis,
@@ -500,7 +499,6 @@ async function processIndividualFallback(
     const rows = await updateMessagesAIAnalysisBulk(updates);
     for (const row of rows) {
       broadcastAnalysisCompleted(row);
-      invalidateAnalyticsCache(row.guild_id);
       scheduleAutoDelete(row);
 
       // Update reputation autonomously (Belajar & Kebijaksanaan)