Branch-Scoped Sequence IDs in Harness CI

Harness CI introduces branch-scoped build sequence IDs to address the limitations of traditional global build counters used in Continuous Integration (CI) systems. By enabling each branch to have its own incrementing counter, this feature eliminates gaps and confusion in build numbering that often arise when different branches increment the same global counter. This advancement allows for more meaningful and clear versioning, where each branch reflects its own release reality, rather than the overall CI activity. The branch-scoped sequence IDs are implemented as a first-class capability in Harness CI, allowing tags and version strings to be more intuitive and aligned with actual branch activity. This development fills a significant gap in the CI tooling landscape, offering a more streamlined and coherent approach to build numbering without requiring additional scripts or plugins.