What's Changed

• Deduplicate k6 test code and update k6/README.md by @ggyuchive in https://github.com/yorkie-team/yorkie/pull/1663
• Extract shared generic abstractions for pubsub and stream handling by @hackerwins in https://github.com/yorkie-team/yorkie/pull/1664
• Add max concurrent cluster RPCs configuration by @emplam27 in https://github.com/yorkie-team/yorkie/pull/1667
• Add cluster RPC and client timeout configurations by @emplam27 in https://github.com/yorkie-team/yorkie/pull/1665
• Add connection pool size configuration for cluster client by @emplam27 in https://github.com/yorkie-team/yorkie/pull/1669
• Replace WatchDocument and WatchChannel with unified Watch RPC by @hackerwins in https://github.com/yorkie-team/yorkie/pull/1666
• Refactor logging to use shared core for named loggers by @emplam27 in https://github.com/yorkie-team/yorkie/pull/1672
• Rename DisableWebhookValidation to EnableWebhookValidation by @hackerwins in https://github.com/yorkie-team/yorkie/pull/1673
• Enhance configuration tests and refactor backend config initialization by @emplam27 in https://github.com/yorkie-team/yorkie/pull/1674

Full Changelog: https://github.com/yorkie-team/yorkie/compare/v0.6.47...v0.6.48