refactor: atomic, DRY, and logging improvements across codebase

- Split llmModerationClient.ts (2170 lines) into 5 focused sub-modules
- Split aiAnalyzer.ts (1282 lines) into 4 modular pipelines
- Split messages.db.ts (826 lines) into 5 domain-specific modules
- Moved shared schema to @bete/shared, eliminated backend duplication
- Added createChildLogger to all voice-recording and AI moderation modules
- Extracted tryCommandThenFallback, normalizeMediaState, DEFAULT_VOICE_STATUS
- Created shared pagination.ts utility, eliminated 5+ cursor-pagination duplications
- Created shared messageMapper.ts for row mapping
- Standardized backend error handling with asyncHandler
- Added frontend createLogger utility and useAsyncAction hook
- Added structured logging to frontend hooks, socket, and API client

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

services/backend/src/modules/health/health.controller.ts

@@ -1,16 +1,12 @@
-import type { NextFunction, Request, Response } from "express";
+import type { Request, Response } from "express";
 import { asyncHandler } from "../../shared/middlewares/index.js";
 import { healthService } from "./health.service.js";
 
-export function handleHealthCheck(
-  req: Request,
-  res: Response,
-  next: NextFunction,
-) {
-  return asyncHandler(async (req: Request, res: Response) => {
+export const handleHealthCheck = asyncHandler(
+  async (req: Request, res: Response) => {
     const verbose = req.query.verbose === "true";
     const result = await healthService.getHealth(verbose);
     const status = result.status === "healthy" ? 200 : 503;
     res.status(status).json(result);
-  })(req, res, next);
-}
+  },
+);