add storage scp_prefix properties

bfabric/entities/storage.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
-from typing import Any
+from functools import cached_property
+from typing import Any, TYPE_CHECKING
 
 from bfabric import Bfabric
 from bfabric.entities.core.entity import Entity
@@ -11,3 +12,16 @@ class Storage(Entity):
 
     def __init__(self, data_dict: dict[str, Any], client: Bfabric | None) -> None:
         super().__init__(data_dict=data_dict, client=client)
+
+    @cached_property
+    def scp_prefix_no_path(self) -> str:
+        """SCP prefix without storage base path included."""
+        result = self._client.read("access", {"storageid": self.id, "type": "scp"})
+        if len(result) != 1:
+            raise ValueError(f"Expected exactly 1 SCP access for storage {self.id}, actual: {len(result)}")
+        return f"{result[0]['host']}:"
+
+    @cached_property
+    def scp_prefix_full(self) -> str:
+        """SCP prefix with storage base path included."""
+        return f"{self.scp_prefix_no_path}{self.data_dict['basepath']}"