fix: FileUploadRateLimit 10→200/小时，支持批量上传

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/common/decorators/rate-limit.decorator.ts

@@ -24,9 +24,9 @@ export const FeedbackRateLimit = () =>
 export const AiAnalysisRateLimit = () =>
   RateLimit({ key: 'ai', maxRequests: 50, windowSeconds: 86400 });
 
-/** 文件上传：单用户每小时 10 次 */
+/** 文件上传：单用户每小时 200 次 */
 export const FileUploadRateLimit = () =>
-  RateLimit({ key: 'upload', maxRequests: 10, windowSeconds: 3600 });
+  RateLimit({ key: 'upload', maxRequests: 200, windowSeconds: 3600 });
 
 /** 管理员登录：单 IP 每 15 分钟 10 次 */
 export const AdminLoginRateLimit = () =>