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

types/source.guidance.md

@@ -45,10 +45,11 @@ some source page - never whether anyone decided about its contents. Left unwritt
 source is renegotiated on every later pass.
 
 - Record every deliberate omission with a **reason**, not just a filename.
-- Mandatory where the ingest ran through `instructions/ingest-large-tree.md` - on both axes: for
-  a tree ingest the section records what was not taken from the tree; for a thematically broad
-  single source, which named subjects got no page of their own, and why. Optional for a single
-  small file - but an empty section still beats a missing one.
+- Mandatory where the ingest ran through `instructions/ingest-large-tree.md` - on every axis:
+  for a tree ingest the section records what was not taken from the tree; for a thematically
+  broad single source, which named subjects got no page of their own, and why; for a long
+  source, which of its parts or kinds of content no unit's fact list took over, and why. Optional
+  for a single small file - but an empty section still beats a missing one.
 - Belongs on the source page, not in `kb/log.md`: it is a statement about *this* source, and the
   log is chronological rather than per-source.