make python app load a bit eariler, making startup a bit faster

Azaion.Inference/file_data.pyx

@@ -0,0 +1,14 @@
+from msgpack import unpackb
+
+cdef class FileData:
+
+    def __init__(self, str folder, str filename):
+        self.folder = folder
+        self.filename = filename
+
+    @staticmethod
+    cdef from_msgpack(bytes data):
+        unpacked = unpackb(data, strict_map_key=False)
+        return FileData(
+            unpacked.get("Folder"),
+            unpacked.get("Filename"))