Detect redundant local copy of the object in Object Policer. Add redundant
copy callback (`WithRedundantCopyCallback` option). Pass address of the
redundant copy to callback.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Policer to call AddTask method of Replicator when an insufficient
number of copies of an object is detected in the container.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement Policer service that performs background work to check compliance
with the placement policy for local objects in the container. In the initial
implementation, the selection of the working queue of objects is
simplified, and there is no transfer of the result to the replicator.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
