Remove Portuguese translations from KBART headers

[Copilot]

EBSCO requires KBART files to use standard English field names per NISO RP-9-2014 guidelines. Current headers include Portuguese translations in parentheses, which violates the spec.

Changes

• export/kbart.py: Stripped Portuguese translations from all 25 header fields
• Docstring: Updated to reflect English-only format

Before/After

# Before
header = [
    u"Título do Periódico (publication_title)",
    u"ISSN impresso (print_identifier)",
    u"ISSN online (online_identifier)",
    # ... 22 more fields
]

# After
header = [
    u"publication_title",
    u"print_identifier",
    u"online_identifier",
    # ... 22 more fields
]

Output changes from:

"Título do Periódico (publication_title)","ISSN impresso (print_identifier)"

To:

"publication_title","print_identifier"

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Retirar traduções em pt-BR dos cabeçalhos dos arquivos KBART</issue_title>
<issue_description>A EBSCO solicitou ajustes no KBART, para que estejam compatíveis com as diretrizes do KBART.

Retirar títulos em português, são esperados apenas títulos em inglês.
Como é hoje:
Título do Periódico (publication_title),"ISSN impresso (print_identifier)","ISSN online (online_identifier)"

Como deveria ser:
publication_title, print_identifier, online_identifier

Mensagem original da EBSCO:
The headers include translations of the standard headers (publication_title, print_identifier, etc.). Would it be possible for the files to include only the standard header in English without parentheses?
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Retirar traduções em pt-BR dos cabeçalhos dos arquivos KBART #70

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[Copilot]

Pull request overview

This PR updates KBART export headers to comply with NISO RP-9-2014 guidelines as requested by EBSCO. The changes remove Portuguese translations from header field names, keeping only the standard English field names.

Changes:

• Removed Portuguese translations from all 25 KBART header fields in export/kbart.py
• Updated module docstring to reflect the English-only header format

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[Copilot]

The documentation in docs/source/tools.rst (lines 203-213 and 265-275) still references the old Portuguese field names. These documentation sections should be updated to reflect the new English-only header format to stay consistent with the code changes.