[Source](https://github.com/AcademySoftwareFoundation/rez/tree/2.52.1) | [Diff](https://github.com/AcademySoftwareFoundation/rez/compare/2.52.0...2.52.1)
**Merged pull requests:**
- added new env vars - REZ_SHELL_INIT_TIMESTAMP, REZ_SHELL_INTERACTIVE [\834](https://github.com/AcademySoftwareFoundation/rez/pull/834) ([nerdvegas](https://github.com/nerdvegas))
**Closed issues:**
- add env-var to record shell init time [\833](https://github.com/AcademySoftwareFoundation/rez/issues/833)