New archi: domain driven development

Working but need to check out code

infrastructure/filesystem/exceptions.py

@@ -0,0 +1,21 @@
+"""Filesystem exceptions."""
+
+
+class FilesystemError(Exception):
+    """Base exception for filesystem operations."""
+    pass
+
+
+class PathTraversalError(FilesystemError):
+    """Raised when path traversal attack is detected."""
+    pass
+
+
+class FileNotFoundError(FilesystemError):
+    """Raised when a file is not found."""
+    pass
+
+
+class PermissionDeniedError(FilesystemError):
+    """Raised when permission is denied."""
+    pass