[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/tests/chat_completions_payload.rs

@@ -79,6 +79,7 @@ async fn run_request(input: Vec<ResponseItem>) -> Value {
         config.model.as_str(),
         config.model_family.slug.as_str(),
         None,
+        Some("test@test.com".to_string()),
         Some(AuthMode::ChatGPT),
         false,
         "test".to_string(),

codex-rs/core/tests/chat_completions_sse.rs

@@ -78,6 +78,7 @@ async fn run_stream_with_bytes(sse_body: &[u8]) -> Vec<ResponseEvent> {
         config.model.as_str(),
         config.model_family.slug.as_str(),
         None,
+        Some("test@test.com".to_string()),
         Some(AuthMode::ChatGPT),
         false,
         "test".to_string(),

codex-rs/core/tests/responses_headers.rs

@@ -63,6 +63,7 @@ async fn responses_stream_includes_task_type_header() {
         config.model.as_str(),
         config.model_family.slug.as_str(),
         None,
+        Some("test@test.com".to_string()),
         Some(AuthMode::ChatGPT),
         false,
         "test".to_string(),

codex-rs/core/tests/suite/client.rs

@@ -657,6 +657,7 @@ async fn azure_responses_request_includes_store_and_reasoning_ids() {
         config.model.as_str(),
         config.model_family.slug.as_str(),
         None,
+        Some("test@test.com".to_string()),
         Some(AuthMode::ChatGPT),
         false,
         "test".to_string(),