Internal moves get no re-export aliases: models_validate reads
hermes_constants.openrouter_variant_base directly and the private
_OPENROUTER_VARIANT_SUFFIXES/_openrouter_variant_base shims are dropped.
For each issue anchor present in BASE 63279301bc non-test .py and absent on HEAD, the BASE comment/docstring block was re-attached at the HEAD location of the code it explained (matched by the distinctive code line / enclosing def). Sentences already covered by an existing HEAD comment were deduped; the issue number always survives. Insert-only: no code lines changed.