Add basic CutBookkeepers information to MetaReader
Add basic CutBookkeepers information to MetaReader. It's added to peeker mode as I think it will be commonly used (hint: CutFlowSvc). For now we can peek current cut cycle and current cut input stream.
Targeting 22.0 as we may want to backport any future CutFlowSvc-related improvements there anyways. Running with full-unit-tests just in case.