[codex] surface rollout budget exhaustion (#29715)

## Summary
- surface shared rollout-budget exhaustion as
`CodexErr::RolloutBudgetExceeded` instead of a generic interrupted turn
- map it through the existing `CodexErrorInfo` and app-server v2
`codexErrorInfo` path
- keep local compaction from retrying after the shared rollout budget is
exhausted

This gives app-server clients a stable `rolloutBudgetExceeded` error
they can classify without guessing from `status="interrupted"`.

## Tests
- `just test -p codex-core rollout_budget`

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

@@ -30,7 +30,7 @@ impl Session {
             .rollout_budget()
             .record_usage(usage)
         {
-            return Err(CodexErr::TurnAborted);
+            return Err(CodexErr::RolloutBudgetExceeded);
         }
         Ok(())
     }