fix: Remove invalid Tooltip attribute from architecture property

Author: trkim

Runtime/LLM.cs

@@ -273,7 +273,7 @@ public string SSLKey
         public LLMService llmService { get; private set; }
 
         /// <summary>Model architecture name (e.g., "llama", "mistral")</summary>
-        [Tooltip("Model architecture name (e.g., "llama", "mistral")")]
+        [Tooltip("Model architecture name (e.g., \"llama\", \"mistral\")")]
         public string architecture => llmlib?.architecture;
 
         /// <summary>True if this model only supports embeddings (no text generation)</summary>