Argos and similar MT often corrupt %(name)s (e.g. "% (horas)") or swap in
positional %s, causing ValueError during dashboard render.
- Add scripts/sanitize_po_format_strings.py to clear invalid msgstr / plural
strings so gettext falls back to English msgids.
- Run sanitizer on translations/pt; msgfmt --check-format now passes.
- Document sanitizer + msgfmt after bulk fill in TRANSLATION_SYSTEM and
fill_po_argos header.
Dries Peeters