[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/analytics/src/facts.rs

@@ -139,6 +139,7 @@ impl TurnCodexErrorFact {
 #[serde(rename_all = "snake_case")]
 pub enum CodexErrKind {
     TurnAborted,
+    RolloutBudgetExceeded,
     Stream,
     ContextWindowExceeded,
     ThreadNotFound,
@@ -195,6 +196,7 @@ impl From<&CodexErr> for CodexErrKind {
     fn from(error: &CodexErr) -> Self {
         match error {
             CodexErr::TurnAborted => CodexErrKind::TurnAborted,
+            CodexErr::RolloutBudgetExceeded => CodexErrKind::RolloutBudgetExceeded,
             CodexErr::Stream(..) => CodexErrKind::Stream,
             CodexErr::ContextWindowExceeded => CodexErrKind::ContextWindowExceeded,
             CodexErr::ThreadNotFound(_) => CodexErrKind::ThreadNotFound,