* Brokers API improvements:
1. broker io rates stats added
2. active controller property set to node id
3. minor refactoring
4. FE: Add an indicator for an active broker controller
Co-authored-by: Mgrdich <mgotm13@gmail.com>
Co-authored-by: iliax <ikuramshin@provectus.com>
Co-authored-by: Hrant Abrahamyan <113341474+habrahamyanpro@users.noreply.github.com>
Co-authored-by: Mgrdich <mgotm13@gmail.com>
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