This patches an issue that could lead to manifest corruption. Fix was merged in #1756. Addresses this issue on Discuss and this issue on Badger. We also bring the release branch to parity with main by updating the CI/CD jobs, Readme, Codeowners, PR and issue templates, etc.

Fixed

• fix(manifest): fix manifest corruption due to race condition in concurrent compactions (#1756)

Chores

• Add CI/CD jobs to release branch
• Add PR and Issue templates to release branch
• Update Codeowners in release branch
• Update Readme in release branch

Full Changelog: https://github.com/dgraph-io/badger/compare/v3.2103.3...v3.2103.4