* feat: per-transformation custom model selection
Fixes#776
* fix: validate model_id exists when creating or updating a transformation
The create and update endpoints persisted model_id without checking the
referenced model exists, so an invalid reference was stored silently and only
surfaced later as a 404 at execution time. Add the same existence check
execute_transformation already performs (Model.get -> 404 if missing) to both
the create and update paths, so a bad model_id is rejected up front with a
clear 404. Update still allows clearing model_id to None.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* test: cover model_id existence validation on transformation create/update
The create test now mocks Model.get so the new existence check passes and
asserts it was awaited with the supplied model_id. The update test expects
Model.get to be awaited twice (once validating the update, once at execute)
rather than once.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* docs: add CHANGELOG entry for per-transformation model selection (#776)
---------
Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Luis Novo <lfnovo@gmail.com>
