rollout: persist turn permission profiles (#18281)

## Why

Resume and reconstruction need to preserve the permissions that were
active for each user turn. If rollouts only keep legacy sandbox fields,
replay cannot faithfully represent profile-shaped overrides introduced
earlier in the stack.

## What changed

This records `permission_profile` on user-turn rollout events,
reconstructs it through history/state extraction, and updates rollout
reconstruction and related fixtures to keep the field explicit.

## Verification

- `cargo test -p codex-core --test all permissions_messages --
--nocapture`
- `cargo test -p codex-core --test all request_permissions --
--nocapture`











































---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/18281).
* #18288
* #18287
* #18286
* #18285
* #18284
* #18283
* #18282
* __->__ #18281

codex-rs/rollout/src/recorder_tests.rs

@@ -947,6 +947,7 @@ async fn resume_candidate_matches_cwd_reads_latest_turn_context() -> std::io::Re
             timezone: None,
             approval_policy: AskForApproval::Never,
             sandbox_policy: SandboxPolicy::new_read_only_policy(),
+            permission_profile: None,
             network: None,
             file_system_sandbox_policy: None,
             model: "test-model".to_string(),