testfiles: real documents get short names and a source table, personal data is replaced by same-length filler (#203)

Adds the nineteen real documents under testfiles/ (mail, Office, PDF, ZIP) with short ASCII names. Recipient addresses, names, host names, mailbox identifiers and recipient-bound tokens are replaced by filler of the same length, and the archive is rebuilt from the sanitized members. test_raw_derive_testfiles.py now compares the sheet TSVs too (with a direct test on _texts()), and a real workbook carries a formula needle that only a .formulas.tsv holds. testfiles/README.md gains the provenance table and the two new rules.

Files changed:
- CHANGES.md
- VERSION
- testfiles/README.md
- testfiles/mail/github-outlook.msg
- testfiles/mail/github-roundcube.eml
- testfiles/mail/gog-outlook.msg
- testfiles/mail/gog-roundcube.eml
- testfiles/mail/tldr-outlook.msg
- testfiles/mail/tldr-roundcube.eml
- testfiles/office/excel-artificial.xlsx
- testfiles/office/excel-business.xlsx
- testfiles/office/excel-business.xlsx.expect
- testfiles/office/excel-science.xlsx
- testfiles/office/pptx-baseline.pptx
- testfiles/office/pptx-master.pptx
- testfiles/office/pptx-objects.pptx
- testfiles/office/word-complex.docx
- testfiles/office/word-simple.docx
- testfiles/pdf/einstein-dissertation.pdf
- testfiles/pdf/ifg.pdf
- testfiles/pdf/nist-ai-rmf.pdf
- testfiles/pdf/nist-ssdf-genai.pdf
- testfiles/zip/archive.zip
- tools/chemenu/tests/test_raw_derive_testfiles.py

Co-Authored-By: Claude Code <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

CHANGES.md

@@ -14,7 +14,7 @@ place only: `instructions/dev/version-parts.md` § The candidate model.
 
 ---
 
-## 9.0.0-beta.18 - 2026-10-09 - raw derive writes an Excel file's sheets as tab-separated files with a formula list; derived.md becomes the overview (#202)
+## 9.0.0-beta.19 - 2026-10-09 - testfiles: real documents get short names and a source table, personal data is replaced by same-length filler, and the derive test now compares the sheet TSVs (#203)
 
 **Author:** Torben Nehmer
 
@@ -48,6 +48,7 @@ place only: `instructions/dev/version-parts.md` § The candidate model.
 - Gitea-Wiki als generierter Spiegel von docs/: Konverter, Push-Skript, Workflows
 - raw pending names only the raw fetch pair as a bundle; a derived document is a folder
 - raw derive writes an Excel file's sheets as tab-separated files with a formula list; derived.md becomes the overview (#202)
+- testfiles: real documents get short names and a source table, personal data is replaced by same-length filler, and the derive test now compares the sheet TSVs (#203)
 <!-- /wikitool:bumps -->
 
 ### Tutorials: installation in English, and a first source to a first answer (#191)