op-acceptance-tests: resolve TestMaxSafeLagStallAndResume kona-node skip

## Summary

[`TestMaxSafeLagStallAndResume`](https://github.com/ethereum-optimism/optimism/blob/develop/op-acceptance-tests/tests/sequencer/max_safe_lag_test.go) is skipped when the acceptance suite runs against kona-node.

The test exercises `sequencer.max-safe-lag`, which is currently an op-node-specific sequencer feature rather than shared CL behavior.

## Required work

Decide whether Kona should implement equivalent max-safe-lag behavior. If so, add it and enable the test; otherwise make the client-specific scope explicit so the intentional exclusion is not tracked as an unexplained compatibility skip.

## Acceptance criteria

- [ ] The root cause and resolution are documented.
- [ ] The Kona exclusion is either removed or represented as an explicit, documented client-feature scope.
- [ ] The resolution is documented and the test is either enabled for Kona or explicitly scoped to the client feature it covers.
- [ ] Existing op-node coverage continues to pass.

## Related

- https://github.com/ethereum-optimism/optimism/issues/17936
- Parent inventory: https://github.com/ethereum-optimism/protocol-team/issues/101