tools: Export- und Eingangsordner im Backup-Ziel - Überschneidungsregel nur noch auf <ziel>/git und den eigenen Maschinenordner, Laufzeitprüfung auf Vorfahren in upload collect und export run (#216); 10.1.0-beta.16

Files changed:
- CHANGES.md
- VERSION
- docs/how-to/back-up-to-a-synced-folder.md
- docs/how-to/collect-from-a-synced-folder.md
- docs/how-to/export-to-a-synced-folder.md
- docs/reference/commands/exports.md
- docs/reference/commands/raw-material-and-uploads.md
- docs/reference/configuration.md
- tools/CONTRACT.md
- tools/chemenu/backup.py
- tools/chemenu/collect.py
- tools/chemenu/commands/export_cmd.py
- tools/chemenu/commands/upload_cmd.py
- tools/chemenu/config_shapes.py
- tools/chemenu/page_export.py
- tools/chemenu/tests/test_collect.py
- tools/chemenu/tests/test_export_run.py
- tools/chemenu/upload.py

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

docs/how-to/collect-from-a-synced-folder.md

@@ -44,8 +44,13 @@ checkout, so it is yours to edit by hand in `.wikitool-local.json`.
 }
 ```
 
-`path` has to be absolute and lie outside the instance. Check it with `tools/wikitool doctor`, then
-pull:
+`path` has to be absolute and lie outside the instance. It may sit in the folder that also holds
+the backup and an export, as `<OneDrive - company>\Chemenu\Inbox` beside `git`, the machine folder
+and `Export` ([the layout](back-up-to-a-synced-folder.md#one-folder-for-the-backup-the-intake-and-the-export)),
+but it must not be, or lie in, `<backup.target>/git` or a machine folder of the backup. `upload
+collect` also refuses, for that channel alone and before it reads anything, a folder that holds or
+lies in a machine folder of any machine, a bare repository or an export: it empties its folder, and
+these are not submissions. Check it with `tools/wikitool doctor`, then pull:
 
 ```bash
 tools/wikitool upload collect            # every pull channel