[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/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -7070,6 +7070,7 @@
           {
             "enum": [
               "contextWindowExceeded",
+              "rolloutBudgetExceeded",
               "usageLimitExceeded",
               "serverOverloaded",
               "cyberPolicy",