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/frontend/src/shared/api/client.ts

@@ -1,5 +1,7 @@
 // ─── Shared HTTP client — all API endpoints in one file ──────────────────────
 
+import type { MessageRecord } from "@bete/shared";
+
 const BE_API_URL = import.meta.env.VITE_BE_API_URL || "http://localhost:3001";
 const BE_WS_URL = import.meta.env.VITE_BE_WS_URL || "ws://localhost:3001";
 
@@ -57,32 +59,7 @@ export interface PageResult<T> {
   nextCursor: string | null;
 }
 
-export interface MessageRecord {
-  id: string;
-  guild_id: string;
-  channel_id: string;
-  thread_id: string | null;
-  user_id: string;
-  username: string;
-  avatar_url: string | null;
-  content: string;
-  edited_content: string | null;
-  created_at: number;
-  edited_at: number | null;
-  deleted_at: number | null;
-  type: "text" | "edited" | "deleted";
-  metadata: string | null;
-  ai_status?: string | null;
-  ai_moderation_flags?: string | null;
-  ai_moderation_score?: number | null;
-  ai_analysis?: string | null;
-  ai_categories?: string | null;
-  ai_severity?: string | null;
-  ai_confidence?: number | null;
-  ai_recommended_action?: string | null;
-  ai_analyzed_at?: number | null;
-  ai_error?: string | null;
-}
+export type { MessageRecord };
 
 export interface Guild {
   id: string;