Enable clock tools for persistent reasoning turns (#40942)

## What changed

- Default the current-time reminder and interruptible `clock.sleep` tool on for
  turns using persistent reasoning effort.
- Preserve explicit `features.current_time_reminder` settings and managed
  requirements, and gate reminder recording on the resolved feature state.

## Testing

- Cover configured, persistent, ordinary-effort, explicitly disabled, and
  managed-disabled clock setups.
- Verify review turns do not expose clock tools or current-time reminders.

GitOrigin-RevId: 4ff8805807ceeef374abd962b1d9e7c37f1fbd83

codex-rs/core/src/session/turn_context.rs

@@ -18,6 +18,7 @@ use codex_protocol::config_types::ShellEnvironmentPolicy;
 use codex_protocol::models::AdditionalPermissionProfile;
 use codex_protocol::openai_models::MODEL_SPECIALTY_CYBER;
 use codex_protocol::openai_models::ModelInfo;
+use codex_protocol::openai_models::ReasoningEffort;
 use codex_protocol::permissions::RawFileSystemSandboxPolicy;
 use codex_protocol::protocol::EnvironmentConfig;
 use codex_protocol::protocol::EnvironmentConfigState;
@@ -725,6 +726,9 @@ impl Session {
 
         let mut per_turn_config = per_turn_config;
         super::token_budget::apply_model_defaults(&mut per_turn_config, model_info);
+        if step_settings.reasoning_effort() == Some(&ReasoningEffort::Persistent) {
+            super::time_reminder::apply_persistent_defaults(&mut per_turn_config);
+        }
         per_turn_config.service_tier = step_settings.service_tier.clone();
         let permission_profile = environments.permission_profile_or_else(|| {
             per_turn_config.permissions.effective_permission_profile()