fix(architecture): satisfy ruff/mypy ratchets for media auxiliary

e02418bac 把新导入放在 settings = RuntimeSettingsCompat() 之后，
导致 5 个模块 E402 诊断超出只降不增基线；同时 media_auxiliary
把工厂函数 MetaInfo 误用作返回类型标注。将新增导入移回赋值语句
之前，返回类型修正为 MetaBase。

app/modules/bangumi/__init__.py

@@ -1,10 +1,10 @@
 from dataclasses import dataclass
 from typing import Any, List, Optional, Tuple, Union
 
-from app.runtime.settings import RuntimeSettingsCompat
+from app.modules._base.media_auxiliary import MediaAuxiliaryProviderMixin
+from app.runtime.settings import get_runtime_setting
 from app.schemas.context import MediaPerson as _SchemaMediaPerson
 
-settings = RuntimeSettingsCompat()
 from app.adapters.network.http import RequestUtils
 from app.domain.context import MediaInfo
 from app.domain.media import is_media_source_enabled
@@ -12,7 +12,6 @@ from app.domain.meta.metabase import MetaBase
 from app.domain.scraper import MediaScraperHelper
 from app.modules import _ModuleBase
 from app.modules.bangumi.bangumi import BangumiApi
-from app.modules._base.media_auxiliary import MediaAuxiliaryProviderMixin
 from app.runtime.log import logger
 from app.schemas.types import (
     MediaRecognizeType,
@@ -45,7 +44,7 @@ class BangumiModule(MediaAuxiliaryProviderMixin, _ModuleBase):
         """
         初始化Bangumi客户端
         """
-        self._config = BangumiConfigSnapshot(proxy=settings.PROXY)
+        self._config = BangumiConfigSnapshot(proxy=get_runtime_setting("PROXY"))
         self.bangumiapi = BangumiApi()
         self.scraper = MediaScraperHelper()
 
@@ -127,7 +126,7 @@ class BangumiModule(MediaAuxiliaryProviderMixin, _ModuleBase):
             return None
         bangumiid = int(media_id) if media_id is not None else None
         if not bangumiid and (
-            not meta or (media_source or settings.RECOGNIZE_SOURCE) != MediaSource.Bangumi
+            not meta or (media_source or get_runtime_setting("RECOGNIZE_SOURCE")) != MediaSource.Bangumi
         ):
             return None
 
@@ -176,7 +175,7 @@ class BangumiModule(MediaAuxiliaryProviderMixin, _ModuleBase):
             return None
         bangumiid = int(media_id) if media_id is not None else None
         if not bangumiid and (
-            not meta or (media_source or settings.RECOGNIZE_SOURCE) != MediaSource.Bangumi
+            not meta or (media_source or get_runtime_setting("RECOGNIZE_SOURCE")) != MediaSource.Bangumi
         ):
             return None
 
@@ -317,7 +316,7 @@ class BangumiModule(MediaAuxiliaryProviderMixin, _ModuleBase):
         :param episode: 集号
         :return: NFO XML文本
         """
-        scrape_source = mediainfo.scrape_source or settings.SCRAP_SOURCE
+        scrape_source = mediainfo.scrape_source or get_runtime_setting("SCRAP_SOURCE")
         if scrape_source != "bangumi":
             return None
         return self.scraper.get_metadata_nfo(mediainfo, season=season, episode=episode)
@@ -336,7 +335,7 @@ class BangumiModule(MediaAuxiliaryProviderMixin, _ModuleBase):
         :param episode: 集号
         :return: 图片文件名与下载地址映射
         """
-        scrape_source = mediainfo.scrape_source or settings.SCRAP_SOURCE
+        scrape_source = mediainfo.scrape_source or get_runtime_setting("SCRAP_SOURCE")
         if scrape_source != "bangumi":
             return None
         return self.scraper.get_metadata_img(mediainfo, season=season, episode=episode)