modify: Cache TypedDict 对齐 chongming-cache 双后端配置（backend/redis_* NotRequired）

src/chongming_worker/config.py

@@ -5,10 +5,10 @@ from typing import TypedDict, Literal, Optional, cast, List, Dict, Any
 # 根据Python版本选择合适的TOML解析库和Required类型
 if sys.version_info >= (3, 11):
     import tomllib
-    from typing import Required
+    from typing import NotRequired, Required
 else:
     import tomli as tomllib
-    from typing_extensions import Required
+    from typing_extensions import NotRequired, Required
 
 
 # ============================================================
@@ -227,9 +227,15 @@ class Scheduler(TypedDict):
 
 
 class Cache(TypedDict):
-    """缓存系统配置"""
+    """缓存系统配置（chongming-cache 双后端：diskcache / redis）"""
 
-    cache_store_path: str
+    backend: NotRequired[str]
+    cache_store_path: Required[str]
+    redis_host: NotRequired[str]
+    redis_port: NotRequired[int]
+    redis_db: NotRequired[int]
+    redis_password: NotRequired[str]
+    redis_prefix: NotRequired[str]
 
 
 class Config(TypedDict):