Re-enable language model for answering questions; remove mock answer

src/ctp_slack_bot/services/language_model_service.py

@@ -45,12 +45,11 @@ class LanguageModelService(BaseModel):
 
                 Please answer the Student Question based on the Context from class materials and transcripts. If the context doesn’t contain relevant information, acknowledge that and suggest asking the professor."""}
         ]
-        # response: ChatCompletion = self._open_ai_client.chat.completions.create(
-        #     model=self.settings.CHAT_MODEL,
-        #     messages=messages,
-        #     max_tokens=self.settings.MAX_TOKENS,
-        #     temperature=self.settings.TEMPERATURE
-        # )
+        response: ChatCompletion = self._open_ai_client.chat.completions.create(
+            model=self.settings.CHAT_MODEL,
+            messages=messages,
+            max_tokens=self.settings.MAX_TOKENS,
+            temperature=self.settings.TEMPERATURE
+        )
         
-        # return response.choices[0].message.content
-        return f"A mock response to “{question}”"
+        return response.choices[0].message.content