2026.2.0-RC1

What's Changed

• [Custom Reports] Add the group field to the config list by @lukmzig in #1751
• Update CLA workflow by @berfinyuksel in #1833
• Delete backup workflow files by @berfinyuksel in #1793
• Mcp token authentication by @fashxp in #1853
• [User] Add theme attribute to User by @martineiber in #1912
• [Release] Prepare 2026.2 by @martineiber in #1921

Full Changelog: v2026.1.6...v2026.2.0-RC1