sistana: move type, cast attr to userspace

src/arclet/alconna/sistana/fragment.py

@@ -1,14 +1,19 @@
 from __future__ import annotations
 
+from typing import Any
 from dataclasses import dataclass
 from elaina_segment import Segment, Quoted, UnmatchedQuoted
 
 from .model.capture import RegexCapture
 from .model.fragment import _Fragment
+from .utils.misc import Some
 
 
 @dataclass
 class Fragment(_Fragment):
+    type: Some[Any] = None
+    cast: bool = False
+
     def apply_msgspec(self):
         if self.type is None:
             return

src/arclet/alconna/sistana/model/fragment.py

@@ -11,9 +11,7 @@
 @dataclass
 class _Fragment:
     name: str
-    type: Some[Any] = None
     variadic: bool = False
-    cast: bool = False
     default: Some[Any] = None
 
     separators: str | None = None