merge左落release branch唔代表released
即係要有extra tag講邊啲change係真點released
又唔係per change咁merge落去release branch閪分得出邊啲出左邊啲未出咩

簡單啲講fuck atomicity

其實如果淨係講binary release係一定實行到，因為架構類似microservice，入面啲library可以各有version，咁每次淨係per service咁出patch係可以omit until need to release

咁其實應該係個omitted change照樣assign version

問題就變做每次出patch都要睇上次出到邊，就好似有multiple branch on the same changes...嗯？

即係一個release嘅trunk同時branch per module？有野ready to release就dev→rel，到真係出就checkout rel-module merge rel head咁樣？

merge rel head要make sure一定係fast forward唔可以有actual branch