extract heights.json and fix manage.py to use uv

manage.py

@@ -1,4 +1,15 @@
 #!/usr/bin/env python
+# /// script
+# requires-python = ">=3.13"
+# dependencies = [
+#     "bs4",
+#     "cryptography",
+#     "django",
+#     "piexif",
+#     "pillow",
+#     "unidecode",
+# ]
+# ///
 import os
 import sys