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

tools/chemenu/tests/test_raw_derive_testfiles.py

@@ -55,6 +55,8 @@ def _texts(folder: Path) -> dict[str, str]:
         texts[md.relative_to(folder).as_posix()] = "\n".join(
             line for line in lines if not line.startswith("derived:")
         )
+    for tsv in sorted(folder.rglob("*.sheets/*.tsv")):
+        texts[tsv.relative_to(folder).as_posix()] = tsv.read_text(encoding="utf-8")
     return texts
 
 
@@ -102,3 +104,17 @@ def test_a_real_document_derives_stably_and_is_accepted(tree, document):
         page=None, replaces=None, dry_run=False,
     )
     assert not (tree / "incoming" / document.stem).exists()
+
+
+def test_texts_covers_the_sheet_tsvs_beside_the_markdown(tmp_path):
+    (tmp_path / "x.sheets").mkdir()
+    (tmp_path / "derived.md").write_text("derived: now\nbody\n", encoding="utf-8")
+    cells = tmp_path / "x.sheets" / "01-a.tsv"
+    cells.write_text("a\tb\n", encoding="utf-8")
+
+    before = _texts(tmp_path)
+    assert before["derived.md"] == "body"
+    assert before["x.sheets/01-a.tsv"] == "a\tb\n"
+
+    cells.write_text("a\tc\n", encoding="utf-8")
+    assert _texts(tmp_path) != before