raw derive/fetch/pending: Länge als dritte Größenachse beim Ingest - eine CHECK-Zeile nennt jeden geschriebenen Text über LONG_TEXT_CHARS (Zeichen der .md wie geschrieben), raw pending markiert eine lange .md/.txt mit long:; ingest-large-tree liest ihn in Teilen nach der Gliederung, je Teil nur den Zeilenbereich, Extrakt als Faktenliste mit Fundstelle und Modalität (#226); 10.1.0-beta.10

Files changed:
- CHANGES.md
- VERSION
- docs/how-to/ingest-a-source.md
- docs/reference/commands/raw-material-and-uploads.md
- instructions/ingest-large-tree.md
- instructions/wiki-ingest/SKILL.md
- raw/CONTRACT.md
- tools/CONTRACT.md
- tools/chemenu/commands/raw/_common.py
- tools/chemenu/commands/raw/derive.py
- tools/chemenu/commands/raw/fetch.py
- tools/chemenu/commands/raw/pending.py
- tools/chemenu/tests/test_raw_derive.py
- tools/chemenu/tests/test_raw_fetch.py
- types/source.guidance.md

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

docs/how-to/ingest-a-source.md

@@ -87,6 +87,12 @@ what is waiting and names the entry the next bare `Ingest` will take.
   estimate, proposes a selection, and you choose all, none or a selection. Pages nobody looked at
   are listed with the reason. Only whole pages are read; a harness that cannot show PDF pages as
   images gets the page numbers named instead.
+- **Before reading a long document in parts.** When the text `raw derive` or `raw fetch` wrote
+  is longer than one pass reads well, the tool says so in a `CHECK` line, and `raw pending` marks
+  a long text file the same way. The agent then does not read it in one go: it cuts it into parts
+  along its outline (or its pages), shows you the plan in a workshop under `work/`, and after your
+  answer reads one part at a time, noting each fact with where it stands. The document stays one
+  file in `raw/` and gets one source page, written from those notes.
 - **Before writing pages**, the agent presents the key takeaways and asks which points matter most
   and what to emphasise. The pages follow your answer.
 - **When it publishes**, a source that touches ten or more files stops at the Mass-Update Gate