(fix): caching symlinked files (#2112)

* Revert "(fix): `org-roam-descendant-of-p` bug on Windows (#2089)"

This reverts commit 97a342fd3f.

Reason:

It seems that the `file-in-directory-p` function proposed in #2089 is provided only for
*physical directories*, does not work as we would like with *symlinked directories*.
It dereferences all the symlinks in its path, and previously seemed related paths
cease to be such.

Because of this, such notes are ignored and not indexed, although they
were indexed earlier.

extensions/org-roam-dailies.el

@@ -289,7 +289,7 @@ If FILE is not specified, use the current buffer's file-path."
     (save-match-data
       (and
        (org-roam-file-p path)
-       (file-in-directory-p path directory)))))
+       (org-roam-descendant-of-p path directory)))))
 
 ;;;###autoload
 (defun org-roam-dailies-find-directory ()