What's Changed

• fix MySQL not allowing default values for JSON column by @scydas in https://github.com/clusterpedia-io/clusterpedia/pull/805
• internalstorage: fix json builder func for mysql by @Iceber in https://github.com/clusterpedia-io/clusterpedia/pull/806

Full Changelog: https://github.com/clusterpedia-io/clusterpedia/compare/v0.9.0-beta.2...v0.9.0-beta.3