tools: export run/upload collect - Fehlertexte im Kommandovertrag nennen die Backup-Ordner und die Laufzeit-Ablehnung von Backup- und Exportdaten (#216); 10.1.0-beta.17

Files changed:
- CHANGES.md
- VERSION
- docs/reference/commands/exports.md
- docs/reference/commands/raw-material-and-uploads.md
- tools/CONTRACT.md
- tools/chemenu/commands/export_cmd.py
- tools/chemenu/commands/upload_cmd.py

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

docs/reference/commands/exports.md

@@ -130,9 +130,9 @@ tools/wikitool export run work-notes
 **Exit codes**
 
 - `0` - success
-- `1` - No `export` section, an unknown target name, or a broken section (a predicate that does not parse, a path inside the instance or in the way of another target, an `intake` folder or the backup target)
+- `1` - No `export` section, an unknown target name, or a broken section (a predicate that does not parse, a path inside the instance or in the way of another target, an `intake` folder or a folder the backup writes into: `<backup.target>/git` or this machine's folder)
 - `1` - `kb/` or `types/` has uncommitted changes, the instance is not a git checkout, or a page under `kb/` has unreadable frontmatter
-- `1` - A target failed: a foreign folder, a file changed in the target, an empty selection, an unknown field, a converter that did not exit 0
+- `1` - A target failed: a foreign folder, a folder in backup data, a file changed in the target, an empty selection, an unknown field, a converter that did not exit 0
 
 **See also**