Pursuing faster time-to-merge for wider community contributions

What this post added

Introduced workflow labels (`workflow::ready for review`, `workflow::in dev`, `workflow::blocked`) to provide clearer states for merge requests, allowing community contributors to self-manage their MRs. Implemented automation via `@gitlab-bot ready` to set the state and assign reviewers. This has reduced the median time MRs spend in the 'ready for review' state from 17 days to 5 days and increased the median Open Community MR Age (OCMA) from 139 days to 78 days. Future work includes automating the transition of MRs back to `workflow::in dev` when further changes are needed.