Merge request backend review checklist doc
MR: Pending
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## Description
~"Merge Requests backend" Reviews are usually requested in tandem with ~backend reviews. There is a general https://docs.gitlab.com/development/code_review/ guideline to guide the code review process. I propose we can come up with something similar to guide the flow of ~"Merge Requests backend" reviews, to differentiate the review process from a ~backend review (since both are required)
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## Acceptance criteria
- [ ] Documentation of ~"Merge Requests backend" review guidelines
## Implementation plan
issue