fix: resolve architecture disconnects and codebase weaknesses

- Standardize MessageRecord types — single source of truth from @bete/shared
- Clean up config: remove unused GUILD_ID/TEXT_GUILD_ID/TEXT_CHANNEL_ID, fix WEBSERVER_PORT default (3001), remove default admin password
- Move mascot_chat_messages table to Drizzle schema with proper migration
- Remove runtime DDL (CREATE TABLE IF NOT EXISTS) from mascot-chat repository
- Remove phantom analytics/ module from documentation
- Add better-sqlite3 dependency to root devDependencies
- Replace 'as any' casts with proper type assertions across AI moderation
- Add error logging to silent catch blocks in LLM client
- Apply Biome formatting and import organization

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

services/discord-gateway/src/shared/config/config.ts

@@ -1,6 +1,9 @@
 import "dotenv/config";
 import type { AppConfig as SharedAppConfig } from "@bete/shared/config";
-import { config as sharedConfig, loadConfig as sharedLoadConfig } from "@bete/shared/config";
+import {
+  config as sharedConfig,
+  loadConfig as sharedLoadConfig,
+} from "@bete/shared/config";
 
 // Re-export the unified config with EFFECTIVE_* fields added
 export type AppConfig = SharedAppConfig & {