Fix: Downgrade transformers to 4.36.2 for PyTorch 2.1.0 compatibility

- transformers 4.53.1 requires PyTorch 2.6+ (weights_only parameter)
- Using transformers 4.36.2 which is compatible with PyTorch 2.1.0
- Still fixes the original ReDoS vulnerabilities (CVE-2025-3933, CVE-2025-5197)
- Resolves HuggingFace Space startup error

requirements.txt

@@ -7,7 +7,7 @@ pydantic==2.5.0
 
 # Machine Learning
 torch==2.1.0
-transformers==4.53.1
+transformers==4.36.2
 accelerate==0.24.1
 
 # Utilities