Extract persisted history types into a dedicated crate (#37871)

## What changed

- Add `codex-history` for model-history and persisted-rollout domain types, including `RolloutItem`, `RolloutLine`, `CompactedItem`, and initial/resumed history state.
- Re-export the persisted types from `codex-rollout` and update consumers to use the new crate boundary instead of `codex-protocol`.
- Preserve existing rollout serialization, including legacy numeric compacted-window IDs.

## Testing

- Add `codex-history` tests for rollout JSON round trips, compacted-history compatibility, persisted history modes, and multi-agent version selection.

GitOrigin-RevId: 944daa9297ddd231d3aebbdcb05fff4adf8b4e1b

codex-rs/state/src/extract.rs

@@ -1,8 +1,8 @@
 use crate::model::ThreadMetadata;
+use codex_history::RolloutItem;
 use codex_protocol::items::TurnItem;
 use codex_protocol::models::ResponseItem;
 use codex_protocol::protocol::EventMsg;
-use codex_protocol::protocol::RolloutItem;
 use codex_protocol::protocol::SessionMetaLine;
 use codex_protocol::protocol::TurnContextItem;
 use codex_protocol::protocol::UserMessageEvent;
@@ -168,6 +168,7 @@ mod tests {
     use crate::model::ThreadMetadata;
     use chrono::DateTime;
     use chrono::Utc;
+    use codex_history::RolloutItem;
     use codex_protocol::ThreadId;
     use codex_protocol::config_types::ApprovalsReviewer;
     use codex_protocol::config_types::CollaborationMode;
@@ -183,7 +184,6 @@ mod tests {
     use codex_protocol::protocol::AskForApproval;
     use codex_protocol::protocol::EventMsg;
     use codex_protocol::protocol::ItemCompletedEvent;
-    use codex_protocol::protocol::RolloutItem;
     use codex_protocol::protocol::SandboxPolicy;
     use codex_protocol::protocol::SessionMeta;
     use codex_protocol::protocol::SessionMetaLine;

codex-rs/state/src/runtime.rs

@@ -23,8 +23,8 @@ use crate::telemetry::DbKind;
 use crate::telemetry::DbTelemetry;
 use chrono::DateTime;
 use chrono::Utc;
+use codex_history::RolloutItem;
 use codex_protocol::ThreadId;
-use codex_protocol::protocol::RolloutItem;
 use serde_json::Value;
 use sqlx::QueryBuilder;
 use sqlx::Row;