What mechanisms for checking and approving Pull Requests were used in your last project?

In my last project, the following mechanisms were used for checking and approving Pull Requests:

• Code review by colleagues: each PR was reviewed by at least one other developer, who checked the code quality, compliance with standards, and absence of errors.
• Automated testing: unit tests and integration tests were run through CI/CD to ensure that changes did not break functionality.
• Static code analysis: tools like SonarQube were used to check style and potential bugs.
• Mandatory approval: a PR could not be merged without approval from designated reviewers.

This approach helps maintain code quality and reduce the number of errors in production.