feat: Add Ai Profiles

src/GreenHome.Domain/AIQuery.cs

@@ -50,6 +50,21 @@ public class AIQuery
     /// </summary>
     public string? Model { get; set; }
 
+    /// <summary>
+    /// AI profile used for this query
+    /// </summary>
+    public int? ProfileId { get; set; }
+
+    /// <summary>
+    /// Navigation property to AIProfile
+    /// </summary>
+    public AIProfile? Profile { get; set; }
+
+    /// <summary>
+    /// Estimated cost of the query in USD (0 = not calculable)
+    /// </summary>
+    public decimal CostUsd { get; set; }
+
     /// <summary>
     /// Temperature parameter used
     /// </summary>