refactor: reorganize backend module boundaries

app/modules/qbittorrent/__init__.py

@@ -5,10 +5,10 @@ from qbittorrentapi import TorrentFilesList
 from torrentool.torrent import Torrent
 
 from app import schemas
-from app.platform.cache import FileCache
-from app.platform.config import settings
+from app.runtime.cache import FileCache
+from app.runtime.config import settings
 from app.domain.metainfo import MetaInfo
-from app.platform.log import logger
+from app.runtime.log import logger
 from app.modules import _ModuleBase, _DownloaderBase
 from app.modules.qbittorrent.qbittorrent import Qbittorrent
 from app.schemas import DownloaderTorrent