flaky test: `TestDABlockThrottling`

**Claude:** Reporting flaky test encountered in CI.

## Test
`TestDABlockThrottling` in `github.com/ethereum-optimism/optimism/op-acceptance-tests/tests/batcher/throttling`

## CI Run
- **Job (`memory-all-kona-op-reth`):** https://app.circleci.com/pipelines/github/ethereum-optimism/optimism/121907/workflows/978bdb7e-c272-4836-8990-d229ae50b297/jobs/4751493
- Branch: `aj/fix/build-kona-host` (pipeline 121907)
- Exit code 1, runtime ~1890s

## Error
```
panic: test timed out after 30m0s
running tests:
TestDABlockThrottling (30m0s)
```

## Date
2026-04-06

## Notes
- The test hit the 30-minute Go test timeout, suggesting it either hung or progressed too slowly to complete within the deadline.