[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/protocol/src/protocol.rs

@@ -1690,6 +1690,7 @@ pub enum NonSteerableTurnKind {
 #[ts(rename_all = "snake_case")]
 pub enum CodexErrorInfo {
     ContextWindowExceeded,
+    RolloutBudgetExceeded,
     UsageLimitExceeded,
     ServerOverloaded,
     CyberPolicy,
@@ -1727,6 +1728,7 @@ impl CodexErrorInfo {
         match self {
             Self::ThreadRollbackFailed | Self::ActiveTurnNotSteerable { .. } => false,
             Self::ContextWindowExceeded
+            | Self::RolloutBudgetExceeded
             | Self::UsageLimitExceeded
             | Self::ServerOverloaded
             | Self::CyberPolicy