chore: add getRev to unit model

[wzhudev]

close #xxx

Pull Request Checklist

• [ ] Related tickets or issues have been linked in the PR description (or missing issue).
• [ ] Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• [ ] Unit tests have been added for the changes (if applicable).
• [ ] Breaking changes have been documented (or no breaking changes introduced in this PR).

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Playwright test results

 3 passed
 1 flaky

Details

 4 tests across 2 suites
 2 minutes, 21 seconds
 d1e7143
 For more information, see full report

Flaky tests

chromium › memory/memory.spec.ts › memory

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 30.59%. Comparing base (4b86a65) to head (d1e7143). Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
...es/core/src/docs/data-model/document-data-model.ts	0.00%	4 Missing :warning:
packages/core/src/slides/slide-model.ts	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #3446 +/- ## ========================================== - Coverage 30.59% 30.59% -0.01% ========================================== Files 2156 2156 Lines 112917 112919 +2 Branches 24764 24764 ========================================== Hits 34546 34546 - Misses 78371 78373 +2 ```

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