Create turns model

src/models/mod.rs

@@ -3,3 +3,4 @@ pub mod purchase;
 pub mod game;
 pub mod character;
 pub mod session;
+pub mod turn;

src/models/turn.rs

@@ -0,0 +1,11 @@
+use uuid::Uuid;
+use chrono::{DateTime, Utc};
+
+pub struct Turn {
+    pub id: Uuid,
+    pub session_id: Uuid,
+    pub user_text: String,
+    pub llm_text: Option<String>,
+    pub sequence_number: i32,
+    pub created_at: DateTime<Utc>
+}