feat(cache): migrate cachetools usage to unified cache backend

app/chain/tmdb.py

@@ -1,10 +1,9 @@
 import random
 from typing import Optional, List
 
-from cachetools import cached, TTLCache
-
 from app import schemas
 from app.chain import ChainBase
+from app.core.cache import cached
 from app.core.context import MediaInfo
 from app.schemas import MediaType
 from app.utils.singleton import Singleton
@@ -119,7 +118,7 @@ class TmdbChain(ChainBase, metaclass=Singleton):
         """
         return self.run_module("tmdb_person_credits", person_id=person_id, page=page)
 
-    @cached(cache=TTLCache(maxsize=1, ttl=3600))
+    @cached(maxsize=1, ttl=3600)
     def get_random_wallpager(self) -> Optional[str]:
         """
         获取随机壁纸，缓存1个小时
@@ -133,7 +132,7 @@ class TmdbChain(ChainBase, metaclass=Singleton):
                     return info.backdrop_path
         return None
 
-    @cached(cache=TTLCache(maxsize=1, ttl=3600))
+    @cached(maxsize=1, ttl=3600)
     def get_trending_wallpapers(self, num: int = 10) -> List[str]:
         """
         获取所有流行壁纸