External git client (SSH): admin console changes are never committed

Changes made in the admin ui are written to the working directory but
never committed. The next sync then fails, because git pull (pull.rebase=true)
refuses to run on a dirty tree. Sync stays broken until the tree is cleared
manually, then breaks again on the next UI change.

PSU 2026.2.2
Windows Server 2022 Standard Evaluation, 10.0.20348
Service: PowerShellUniversal, running as LocalSystem
Git for Windows 2.55.0.windows.3
Remote: git@github.com:user/repo.git (SSH)
External Git Client: on (forced by SSH key selection)
TwoWay + Automatic
Dev/Test License over devolutions account

System gitconfig (C:/Program Files/Git/etc/gitconfig):

user.name=PowerShell Universal
user.email=psu@lab.local
safe.directory=C:/ProgramData/UniversalAutomation/Repository
pull.rebase=true
core.autocrlf=true

Repro:
1. Configure git sync with an SSH remote + SSH key. Clone succeeds, sync OK.
2. Confirm clean working tree.
3. Edit a portal page description in the admin console.
4. git status -> .universal/portalPages.psd1 modified. git log -> no new commit.
5. Next sync:

   [ERR] Git Error: error: cannot pull with rebase: You have unstaged changes.
   [ERR] Failed to sync ("Failed"): Git command failed with exit code 128.
      at GitService.RunGitCommandAsync(String args) in GitService.cs:line 1553
      at GitService.PullAsync() in GitService.cs:line 1018
      at GitSyncService.TrySync(...) in GitSyncService.cs:line 201

With debug logging on, the only git commands logged are "git remote set-url"
and "git pull origin master". There is no git commit or git add, it looks like PSU never
attempts a commit.

Expected per docs: changes made in the admin ui invoke a git commit.