仓库已迁到 gitea.malai.tech，同步更新 go.mod module 声明与全部内部 import，
使其可作为正式 Go 模块被 go get 解析（此前声明路径 gitea.malaihome.work 已不可达）。
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Enhance the ITunesProvider by adding logging with detailed caller information, implementing rate limiting to prevent API abuse, and supporting genre IDs for more precise searches. Also, update the User-Agent string and improve error handling and logging throughout the search and charts functionality.
