raw derive PDF: Gliederung mit Seite und Zeile im Kopf, Hinterlegungen, Durchstreichungen und abweichende Textfarben als Auszeichnung im Text, Bildseiten als CHECK (#225); 10.1.0-beta.1

Files changed:
- CHANGES.md
- VERSION
- docs/reference/commands/raw-material-and-uploads.md
- raw/CONTRACT.md
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/commands/raw/derive.py
- tools/chemenu/filters/__init__.py
- tools/chemenu/filters/pdf.py
- tools/chemenu/filters/pdf_layout.py
- tools/chemenu/tests/binary_formats.py
- tools/chemenu/tests/test_raw_derive_binary.py
- tools/requirements.txt

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

tools/README.md

@@ -69,7 +69,7 @@ excepted.
 
 `jsonschema` and `PyYAML` are hard dependencies, not optional extras: schema
 validation is the tool's whole safety net, so `cli.py` fails loudly with the
-fix rather than degrading silently. `pypdf` and `olefile` are in `requirements.txt` too
+fix rather than degrading silently. `pypdf`, `pdfminer.six` and `olefile` are in `requirements.txt` too
 but are imported only when a PDF or an Outlook `.msg` is derived, so a missing one stops
 that format alone; `doctor` reports each.