[codex][otel] propagate user email in otel events (#5223)

include user email into otel events for proper user-level attribution in
case of workspace setup

codex-rs/core/src/codex.rs

@@ -445,6 +445,7 @@ impl Session {
             config.model.as_str(),
             config.model_family.slug.as_str(),
             auth_manager.auth().and_then(|a| a.get_account_id()),
+            auth_manager.auth().and_then(|a| a.get_account_email()),
             auth_manager.auth().map(|a| a.mode),
             config.otel.log_user_prompt,
             terminal::user_agent(),
@@ -2744,6 +2745,7 @@ mod tests {
             config.model.as_str(),
             config.model_family.slug.as_str(),
             None,
+            Some("test@test.com".to_string()),
             Some(AuthMode::ChatGPT),
             false,
             "test".to_string(),