Fix: loosen strict dependencies to prevent pip backtracking

requirements.txt

@@ -1,10 +1,10 @@
 gradio[oauth,mcp]==6.13.0
-pydantic==2.12.5
-wandb==0.18.7
-datasets==3.0.2
-transformers==4.46.3
-accelerate==1.0.1
+pydantic>=2.0.0
+wandb>=0.18.0
+datasets>=3.0.0
+transformers>=4.46.0
+accelerate>=1.0.0
 trl==0.14.0
 mergekit
-bitsandbytes==0.43.3
+bitsandbytes>=0.43.0
 peft==0.13.2