chore: the .gitignore comment on the generated provider-setup files is in Portuguese

[Victor-w-Madeira]

Problem

CLAUDE.md → Language states that all content in this repository must be
written in English, without exception, and lists inline code comments explicitly.
One comment in .gitignore is in Portuguese:

.gitignore:27:# Artefatos gerados localmente — cada dev gera via collect-models.spec.ts

It documents the two generated provider-setup files on the lines below it
(tests/helpers/provider-setup/data/models.json and providers.json).

Scope — this is the only occurrence

A sweep over every tracked file, excluding docs/ and .claude/, returns exactly
two files:

• .gitignore:27 — the violation above.
• tests/assets/flows/group_test_iadevs.json — not a violation. The
  Portuguese text is the payload of a prompt inside a flow fixture (a
  prompt-engineering guide used as component input), i.e. test data, not repo
  prose. Rewriting it would change what the fixture exercises.

So the fix is one line. Filed separately rather than folded into an unrelated
change so the language rule has a traceable enforcement record.

Deliverables (Done when)

• The comment on .gitignore:27 is in English and still says what those two
  paths are and who generates them.
• No other tracked file outside docs/ and .claude/ carries Portuguese
  prose in a comment or heading (re-verified with the same sweep).
• tests/assets/flows/group_test_iadevs.json is left untouched, and the
  reason is stated in the PR so the next sweep does not re-flag it.