## What changed
- Add a public cursor-based API that reads history entries newest-first from an absolute offset.
- Bound batches to 128 rows and 64 KiB while allowing a single oversized row so pagination always makes progress.
- Reuse validated byte positions for unchanged, uncapped histories, and fall back to offset scans when files are rewritten or capped.
- Preserve offsets for malformed rows and return them without parsed entries.
## Testing
Add coverage for pagination, row and byte limits, oversized and malformed rows, file rewrites, capped-history trimming, appends, and log identity changes.
GitOrigin-RevId: 57e52a4ac150cd15a5bdc3fef8a351a1f2eb0e3c
