Add extra config to StoredThread, leave empty for now (#27092)

codex-rs/app-server/src/request_processors/external_agent_session_import.rs

@@ -177,6 +177,7 @@ impl ExternalAgentSessionImporter {
         let now = Utc::now();
         let create_params = CreateThreadParams {
             thread_id,
+            extra_config: None,
             forked_from_id: None,
             parent_thread_id: None,
             source: source.clone(),

codex-rs/app-server/src/request_processors/thread_processor_tests.rs

@@ -394,6 +394,7 @@ mod thread_processor_behavior_tests {
             ThreadId::from_string("00000000-0000-0000-0000-000000000123").expect("valid thread");
         let stored_thread = StoredThread {
             thread_id,
+            extra_config: None,
             rollout_path: Some(PathBuf::from("/tmp/thread.jsonl")),
             forked_from_id: None,
             parent_thread_id: None,