- Remove old single-level DeltaStore/DeleteSet from disk_provider.rs (replaced by
  three-level LSMDiskANN LevelManager).
- Delete diskann-disk/src/dynamic.rs (old single-file module, now dynamic/ directory).
- Delete test_dynamic_update.sh (superseded by run_benchmarks.sh Phase 4-6 LSMDiskANN tests).
- Delete optimization_report.md (stale).
- Update README.md with new LSMDiskANN three-level architecture documentation and
  benchmark results table.
- Update run_benchmarks.sh with dynamic lifecycle phases and same-codebase comparison.