Create a v2 branch to enable patching v2.x releases while master continues with v3.x development. The last v2 release was v2.90.0 (commit 9ab68b7632627d5c5a7ad2d1d27dac99712fe429, March 27, 2025).
Key Principle: Minimize differences between v2 and v3 workflows. Both branches use azure-native's custom workflows (not ci-mgmt). A future ci-mgmt migration can be done for both branches together.