- Added regression test in `remote-compaction` to verify that concurrent v2 compaction preparation correctly reuses preserved history and avoids redundant re-expansion.
- Added mock-backend verification in `session-storage` to ensure that failed atomic title updates do not rollback newer optimistic state.
- Updated `sql-session-storage` expectations to account for the preserved fixed-width title slot header in session files.
- Expanded `remote-compaction` fetch header validation to include `x-client-request-id` assertion.