improve type checking for Package.files

Author: radoering

src/poetry/core/packages/package.py

@@ -4,6 +4,7 @@
 
 from typing import TYPE_CHECKING
 from typing import ClassVar
+from typing import TypedDict
 from typing import TypeVar
 
 from packaging.utils import canonicalize_name
@@ -36,6 +37,11 @@
     T = TypeVar("T", bound="Package")
 
 
+class PackageFile(TypedDict):
+    file: str
+    hash: str
+
+
 class Package(PackageSpecification):
     AVAILABLE_PYTHONS: ClassVar[set[str]] = {
         "2",
@@ -112,7 +118,7 @@ def __init__(
 
         self._dependency_groups: Mapping[NormalizedName, DependencyGroup] = {}
 
-        self.files: Sequence[Mapping[str, str]] = []
+        self.files: Sequence[PackageFile] = []
         self.optional = False
 
         self.classifiers: Sequence[str] = []