sync and publish name the Rebase-Review Gate by its display name

The help and exit-42 cause texts still said "rebase-review gate" after the display
name was settled; the generated reference and CONTRACT row follow.

Files changed:
- CHANGES.md
- VERSION
- docs/reference/commands/git.md
- docs/reference/exit-codes.md
- tools/CONTRACT.md
- tools/chemenu/commands/git_publish.py

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

CHANGES.md

@@ -14,7 +14,7 @@ place only: `instructions/dev/version-parts.md` § The candidate model.
 
 ---
 
-## 9.0.0-beta.9 - 2026-10-07 - Gate-Liste: AGENTS.md § Gates ist die eine Liste (mit Rebase-Review Gate), cli_contract.GATES hält sie, docs verify vergleicht beide
+## 9.0.0-beta.10 - 2026-10-07 - Rebase-Review Gate: Anzeigename in Hilfe- und Fehlertexten von sync und publish angeglichen
 
 **Author:** Torben Nehmer
 
@@ -39,6 +39,7 @@ place only: `instructions/dev/version-parts.md` § The candidate model.
 - version bump: Abschlussmeldung nennt Stichpunkt oder Themenabsatz statt pauschal Prosa
 - AGENTS.md routing line and a toc.py docstring describe docs/ as the whole human documentation
 - tools/README.md module tree names reference_doc.py and the fourth view cli_contract renders
+- Rebase-Review Gate: Anzeigename in Hilfe- und Fehlertexten von sync und publish angeglichen
 <!-- /wikitool:bumps -->
 
 ### Tutorials: installation in English, and a first source to a first answer (#191)