Fix turn extension data task plumbing (#22646)

## Summary
- carry the per-turn extension data through RunningTask so abort
handling can rebuild SessionTaskContext
- update stale test ExtensionData::new() callsites to pass the turn id

## Testing
- Not run after PR branch creation; CI will cover.

codex-rs/core/src/state/turn.rs

@@ -9,6 +9,7 @@ use tokio::sync::Notify;
 use tokio_util::sync::CancellationToken;
 use tokio_util::task::AbortOnDropHandle;
 
+use codex_extension_api::ExtensionData;
 use codex_protocol::dynamic_tools::DynamicToolResponse;
 use codex_protocol::models::ResponseInputItem;
 use codex_protocol::request_permissions::RequestPermissionProfile;
@@ -75,6 +76,7 @@ pub(crate) struct RunningTask {
     pub(crate) cancellation_token: CancellationToken,
     pub(crate) handle: AbortOnDropHandle<()>,
     pub(crate) turn_context: Arc<TurnContext>,
+    pub(crate) turn_extension_data: Arc<ExtensionData>,
     // Timer recorded when the task drops to capture the full turn duration.
     pub(crate) _timer: Option<codex_otel::Timer>,
 }