Bump transformers version to 5.15.0 to resolve Gemma 4 prompt-enhancer crash

requirements.txt

@@ -1,18 +1,17 @@
-# diffusers from upstream main: LTX-2.5 merged in PR #14447 and is not in a PyPI release yet.
-# Pinned to the merge commit so rebuilds are reproducible; bump deliberately.
-diffusers @ git+https://github.com/huggingface/diffusers@7564fb016dabda0c943416190fc92398c50b1b20
+# LTX-2.5 is in the 0.41.0 release (and on main). The old git pin was the PR #14447
+# merge commit, from before that release existed.
+diffusers>=0.41.0
 
 # gradio and spaces are deliberately absent: the platform preinstalls and pins them, and a competing
 # pin here fails resolution or breaks the ZeroGPU runtime.
 #
 # huggingface_hub IS pinned, which is the exception to that rule rather than an oversight: diffusers
-# main imports `get_cached_repo_tree` in pipelines/pipeline_utils.py, and the base image ships an
-# older hub without it. 1.23.0 is the floor diffusers itself declares.
-huggingface_hub>=1.23.0,<2.0
+# imports `get_cached_repo_tree` in pipelines/pipeline_utils.py, and the base image ships an
+# older hub without it. 1.32.0 is the floor diffusers 0.41 declares.
+huggingface_hub>=1.32.0,<2.0
 gradio_client
-# 5.12.1 breaks at import against current `kernels` (unversioned LayerRepository); 5.14.1 declares
-# kernels>=0.15.2,<0.16 and imports cleanly.
-transformers==5.14.1
+# 5.14.1 crashes on the Gemma 4 prompt-enhancer config (per-layer head_dim).
+transformers==5.15.0
 accelerate
 safetensors
 sentencepiece
@@ -26,7 +25,8 @@ scipy
 
 # The diffusion decoder's NATTEN neighborhood-attention kernel is fetched from the Hub
 # (`shi-labs/natten`) through the `kernels` package — no local natten build, and therefore no torch
-# pin: the ZeroGPU runtime's preinstalled torch is used as-is.
-kernels
+# pin: the ZeroGPU runtime's preinstalled torch is used as-is. The range is what transformers
+# 5.15 declares; `kernels` is an extra there, so this line is what actually enforces it.
+kernels>=0.16.0,<0.17
 torchvision
-torchaudio
+torchaudio