`diff-local` exits 0 on git error

[retran]

Description

When the project is not in a git repository, mxcli diff-local reports "failed to git diff: exit status 128" but exits with code 0.

Steps to Reproduce

cd /tmp && cp -R ~/project.mpr .
./mxcli diff-local -p project.mpr
echo $?  # prints 0

Expected

Exit 1 when git operations fail.

Severity

Low — automation cannot detect failure.

Reproducing test cases

• tooling-test-cases.md § 3.1

[github-actions]

Issue Triage

Summary:
mxcli diff-local returns exit code 0 even though it fails to run git diff when the project isn’t in a Git repository.

Checklist for bug report completeness

Required info	Present?	Notes
mxcli version	❌	Not provided
Mendix version	❌	Not provided
Scenario (what the user was trying to do)	✅	Running diff-local on a project outside a Git repo
Expected output	✅	Should exit with code 1
Experienced output	✅	Prints “failed to git diff: exit status 128” but exits 0
AI bug report (session log or mxcli diag --bundle)	❌	Not included

What’s missing:
To help us investigate, could you please add:

1. The version of mxcli you’re using (mxcli --version or commit/build info).
2. The Mendix version of the project you’re testing with (e.g., 9.x, 10.x).
3. If possible, a session log or the output of mxcli diag --bundle so we can see the surrounding context.

Thanks for reporting this—looking forward to the extra details so we can fix it!

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