Add documents_citations.csv export for tabs_collection.zip

[Copilot]

Implements new CSV export extracting citation metadata from articles for inclusion in tabs_collection.zip.

Changes

• New module publication/documents_citations.py

  • Exports 10 columns per citation: pid, scielo_issn, publication_year, volume, source, doi, publication_type, number_or_suppl, reference_pid, part_title
  • Uses xylose Citation class properties (source, volume, issue, article_title, chapter_title, doi, publication_type, publication_date)
  • Accesses raw citation data fields (v64, v880, v882) for fields not exposed as properties
  • Generates one row per citation; empty row for documents without citations

• Updated publication/dumper.py

  • Integrated documents_citations into main export pipeline
  • CSV generated automatically alongside other document exports

Implementation Notes

Publication year extraction prioritizes Citation.publication_date with fallback to raw v64 field. Issue/supplement info uses Citation.issue property with fallback to v882 field structure. Reference PID extracted directly from v880 field as it's not exposed by xylose.

# Handles all citation types (article, book, thesis, conference, etc.)
for citation in data.citations:
    line = [
        data.publisher_id,
        data.journal.scielo_issn,
        citation.publication_date[0:4] if citation.publication_date else '',
        citation.volume or '',
        citation.source or '',  # Journal/book/thesis title
        citation.doi or '',
        citation.publication_type,
        citation.issue or citation.data.get('v882', [{}])[0].get('n', ''),
        citation.data.get('v880', [{}])[0].get('_', ''),
        citation.article_title or citation.chapter_title or ''
    ]

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Crie um novo csv para tabs_collection.zip: documents_citations.csv</issue_title>
<issue_description>Crie um novo csv para tabs_collection.zip: documents_citations.csv

As colunas devem ser:

• pid
• scielo_issn
• publication_year
• volume
• source (título do periódico, título da tese, título do livro, ...)
• doi
• publication_type (se ausente tentar inferir pelos campos presentes)
• number_or_suppl
• reference pid
• part_title (conteúdo article_title or chapter_title ou vazio)

A fonte dos dados:
https://github.com/scieloorg/xylose/blob/573994f80705eb7f6d4928de69e079468172dda1/xylose/scielodocument.py#L2685

Classe Article:
https://github.com/scieloorg/xylose/blob/573994f80705eb7f6d4928de69e079468172dda1/xylose/scielodocument.py#L2672

</issue_description>

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

• Fixes Crie um novo csv para tabs_collection.zip: documents_citations.csv #88

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