feat: Add `GenerateModelManager` for loading Hugging Face generation models and performing text generation.

services/generate_model_manager.py

@@ -58,8 +58,7 @@ class GenerateModelManager:
     
     def _format_input(self, topic: str, position: str) -> str:
         """Format input for the model"""
-        # Standard format for argument generation
-        return f"generate argument: topic: {topic} stance: {position}"
+        return f"topic: {topic} stance: {position}"
 
     def generate(self, topic: str, position: str, max_length: int = 128, num_beams: int = 4) -> str:
         """Generate argument for a topic and position"""
@@ -83,7 +82,10 @@ class GenerateModelManager:
                 **inputs,
                 max_length=max_length,
                 num_beams=num_beams,
-                early_stopping=True
+                early_stopping=True,
+                no_repeat_ngram_size=3,
+                repetition_penalty=2.5,
+                length_penalty=1.0
             )
             
         # Decode
@@ -114,7 +116,10 @@ class GenerateModelManager:
                 **inputs,
                 max_length=max_length,
                 num_beams=num_beams,
-                early_stopping=True
+                early_stopping=True,
+                no_repeat_ngram_size=3,
+                repetition_penalty=2.5,
+                length_penalty=1.0
             )
             
         # Decode batch