fix missing metadata fields in protocol tests

codex-rs/app-server-protocol/src/protocol/thread_history.rs

@@ -1286,6 +1286,7 @@ mod tests {
                 item: CoreTurnItem::UserMessage(CoreUserMessageItem {
                     id: "user-item-id".to_string(),
                     content: Vec::new(),
+                    metadata: None,
                 }),
             }),
             EventMsg::TurnComplete(TurnCompleteEvent {

codex-rs/app-server-protocol/src/protocol/v2.rs

@@ -7409,6 +7409,7 @@ mod tests {
                     path: "app://demo-app".to_string(),
                 },
             ],
+            metadata: None,
         });
 
         assert_eq!(
@@ -7449,6 +7450,7 @@ mod tests {
                 },
             ],
             phase: None,
+            metadata: None,
         });
 
         assert_eq!(
@@ -7466,6 +7468,7 @@ mod tests {
                 text: "final".to_string(),
             }],
             phase: Some(MessagePhase::FinalAnswer),
+            metadata: None,
         });
 
         assert_eq!(
@@ -7481,6 +7484,7 @@ mod tests {
             id: "reasoning-1".to_string(),
             summary_text: vec!["line one".to_string(), "line two".to_string()],
             raw_content: vec![],
+            metadata: None,
         });
 
         assert_eq!(
@@ -7499,6 +7503,7 @@ mod tests {
                 query: Some("docs".to_string()),
                 queries: None,
             },
+            metadata: None,
         });
 
         assert_eq!(