Add back outlines dependencies required by vLLM 0.5.5 imports

requirements.txt

@@ -10,8 +10,8 @@ torch==2.4.0
 transformers>=4.44
 accelerate>=0.30
 
-# Structured outputs stack used by vLLM (disabled via VLLM_USE_OUTLINES=0)
-# outlines[types]==0.0.46
-# numba==0.59.1
-# pycountry==24.6.1
-# pyairports==0.0.1
+# Structured outputs stack used by vLLM
+# Note: Even with VLLM_USE_OUTLINES=0, vLLM 0.5.5 imports outlines at module level
+outlines==0.0.46
+numba==0.59.1
+pyairports==0.0.1