fix: add explicit defaults for pydantic

Author: seppzer0

builder/managers/resource.py

@@ -26,9 +26,10 @@ class ResourceManager(BaseModel, IResourceManager):
 
     paths: dict[str, Path] = {}
 
-    codename: Optional[str]
-    lkv: Optional[str]
-    base: Optional[str]
+    # explicit value is required here because of defaults above; thx pydantic
+    codename: Optional[str] = None
+    lkv: Optional[str] = None
+    base: Optional[str] = None
 
     def read_data(self) -> None:
         os.chdir(dcfg.root)