[gouyt13]

Summary

Align internal names across Core, FastScan, clustering and SIMD, and document the shared conventions. Clarify query wrappers, scalar/batch scoring outputs, clustering counts/workers and FHT arguments; preserve public APIs, mathematical operations, persisted layouts, G_* fields and niter_.

Update numerical examples and correct three documentation inconsistencies: HNSW code sizes use padded_dim, the IVF layout uses a neutral cluster-metadata label, and IVF add help explains potentially approximate initializer routing. Stub and runtime help use the same wording.

Testing

• Reviewed identifier-token comparison passed for all 27 renamed C++ files.
• Portable Clang 23 CTest: 406 passed, 1 skipped; the placement test passed separately with OpenMP binding enabled.
• Current-source wheel built and installed into an isolated target; all 15 editor/documentation tests passed, with imported extension paths and updated runtime help verified.
• MkDocs strict build, generated-page checks, and all five quantizer example builds/runs passed.
• Repository C++ formatting, Python lint/format, full configured clang-tidy and git diff --check passed.

ARM code was source/token checked; native ARM, Windows and macOS execution was not rerun. No performance change is claimed.