fix: path is a field again, in step with local_path

Core renamed its path property to resolve_path(), because a property
named like a model field wins over the field and makes its value
unreadable - osw.express.FileResult declares exactly such a field. With
path declared here instead, dict()["path"] and __fields__["path"]
work again and the two names always name the same file.

Author: simontaurus

src/osw/controller/file/local.py

@@ -7,7 +7,7 @@
 
 import os
 from pathlib import Path
-from typing import IO, Any, Dict
+from typing import IO, Any, Dict, Optional
 
 from opensemantic.core.v1 import LocalFileController as _LocalFileController
 
@@ -17,11 +17,18 @@
 class LocalFileController(_LocalFileController):
     """File controller for local files"""
 
+    path: Optional[Path] = None
+    """Where the content lives, as a Path. A field, not a property: a property
+    of this name would win over the ``path`` field declared by
+    ``osw.express.FileResult`` and make that field's value unreadable. Kept in
+    step with the model's own ``local_path`` by the constructor, so either name
+    reads the same file."""
+
     class Config:
         arbitrary_types_allowed = True
 
     def __init__(self, **kwargs):
-        path = kwargs.pop("path", None)
+        path = kwargs.get("path")
         if path is not None and not kwargs.get("local_path"):
             kwargs["local_path"] = str(path)
         super().__init__(**kwargs)
@@ -33,6 +40,7 @@ def __init__(self, **kwargs):
             raise ValueError(
                 f"{type(self).__name__} needs a file: pass path= or local_path="
             )
+        self.path = Path(self.local_path)
         self._set_metadata()
 
     @classmethod