refactor: reorganize backend module boundaries

app/application/recognition.py

@@ -0,0 +1,24 @@
+from typing import Optional
+
+from app.db.systemconfig_oper import SystemConfigOper
+from app.schemas.types import SystemConfigKey
+
+
+class RecognitionRuleService:
+    """集中读取用户持久化的媒体识别规则，供启动层注入纯领域匹配器。"""
+
+    def __init__(self, systemconfig: Optional[SystemConfigOper] = None) -> None:
+        """绑定系统配置访问器，测试可传入隔离替身。"""
+        self._systemconfig = systemconfig or SystemConfigOper()
+
+    def get_customization(self) -> object:
+        """返回当前自定义占位符配置。"""
+        return self._systemconfig.get(SystemConfigKey.Customization)
+
+    def get_release_groups(self) -> object:
+        """返回当前用户自定义制作组配置。"""
+        return self._systemconfig.get(SystemConfigKey.CustomReleaseGroups)
+
+    def get_custom_words(self) -> object:
+        """返回当前自定义识别词配置。"""
+        return self._systemconfig.get(SystemConfigKey.CustomIdentifiers)