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/core/src/thread_manager_tests.rs

@@ -11,6 +11,8 @@ use crate::session::tests::make_session_and_context;
 use crate::tasks::InterruptedTurnHistoryMarker;
 use crate::tasks::interrupted_turn_history_marker;
 use codex_extension_api::empty_extension_registry;
+use codex_history::InitialHistory;
+use codex_history::ResumedHistory;
 use codex_models_manager::manager::RefreshStrategy;
 use codex_protocol::ResponseItemId;
 use codex_protocol::capabilities::CapabilityRootLocation;
@@ -23,9 +25,7 @@ use codex_protocol::models::ReasoningItemReasoningSummary;
 use codex_protocol::models::ResponseItem;
 use codex_protocol::openai_models::ModelsResponse;
 use codex_protocol::protocol::AgentMessageEvent;
-use codex_protocol::protocol::InitialHistory;
 use codex_protocol::protocol::InternalSessionSource;
-use codex_protocol::protocol::ResumedHistory;
 use codex_protocol::protocol::SessionMeta;
 use codex_protocol::protocol::SessionMetaLine;
 use codex_protocol::protocol::SessionSource;