Fix/update baskets:

- get_file
- import
- Basket importers must return BasketImportResult
Add API points
Fix utils delete_df and upsert_df, also making them async friendly
Auth: add helper functions to UserRead

src/gisaf/models/admin.py

@@ -157,9 +157,9 @@ class Basket(BasketNameOnly):
 
 
 class BasketImportResult(BaseModel):
-    time: datetime
+    time: datetime = Field(default_factory=datetime.now)
     message: str
-    details: str
+    details: dict[str, str | int | float | bool] | None = None
 
 class AdminBasketFile(BaseModel):
     id: int

src/gisaf/models/authentication.py

@@ -86,6 +86,16 @@ class UserRead(UserBase):
     email: str | None # type: ignore
     roles: list[RoleReadNoUsers] = []
 
+    def can_view(self, model) -> bool:
+        role = getattr(model, 'viewable_role', None)
+        if role:
+            return self.has_role(role)
+        else:
+            return True
+
+    def has_role(self, role: str) -> bool:
+        return role in (role.name for role in self.roles)
+
 
 # class ACL(BaseModel):
 #     user_id: int