consolidate reasoning enums into one (#2428)

We have three enums for each of reasoning summaries and reasoning effort
with same values. They can be consolidated into one.

codex-rs/core/src/codex.rs

@@ -39,8 +39,6 @@ use crate::client::ModelClient;
 use crate::client_common::Prompt;
 use crate::client_common::ResponseEvent;
 use crate::config::Config;
-use crate::config_types::ReasoningEffort as ReasoningEffortConfig;
-use crate::config_types::ReasoningSummary as ReasoningSummaryConfig;
 use crate::config_types::ShellEnvironmentPolicy;
 use crate::conversation_history::ConversationHistory;
 use crate::environment_context::EnvironmentContext;
@@ -107,6 +105,8 @@ use crate::shell;
 use crate::turn_diff_tracker::TurnDiffTracker;
 use crate::user_notification::UserNotification;
 use crate::util::backoff;
+use codex_protocol::config_types::ReasoningEffort as ReasoningEffortConfig;
+use codex_protocol::config_types::ReasoningSummary as ReasoningSummaryConfig;
 
 // A convenience extension trait for acquiring mutex locks where poisoning is
 // unrecoverable and should abort the program. This avoids scattered `.unwrap()`
@@ -1035,8 +1035,8 @@ async fn submission_loop(
                         Arc::new(per_turn_config),
                         None,
                         provider,
-                        effort.into(),
-                        summary.into(),
+                        effort,
+                        summary,
                         sess.session_id,
                     );