Revert gradio + strip schema-breaking kwargs

requirements.txt

@@ -1,11 +1,9 @@
 torch>=2.1
 numpy>=1.24
 matplotlib>=3.7
-# gradio 5.x: 4.44.x hits a json-schema introspection bug
-# (TypeError: argument of type 'bool' is not iterable) when more than a few
-# components are wired to a click handler, which prevents launch().
-gradio>=5.0,<6
-huggingface_hub>=0.24,<2.0
+gradio==4.44.0
+# Pin <1.0: huggingface_hub 1.x dropped HfFolder which gradio 4.x still imports.
+huggingface_hub>=0.24,<1.0
 # Pull the nilmbench package from the companion GitHub repo so the Space's
 # "Benchmark your model" tab reuses the same runner/evaluator/report code.
 nilmbench @ git+https://github.com/Saharmgh/NILMbench@main