transformers>=5.6.0 floor (older silently random-inits the vision tower); add torchvision

requirements.txt

@@ -1,5 +1,6 @@
 torch>=2.7.0
-transformers>=4.52.0
+torchvision            # required by AutoImageProcessor on transformers 5.x
+transformers>=5.6.0    # earlier versions silently random-init the vision tower (see modeling file guard)
 pillow
 # Optional — only needed for int8/int4 quantized loading (runs on CPU and GPU):
 optimum-quanto>=0.2.6