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[Disk Manager] add cloud/disk_manager target
issue-6142: [Disk Manager] Allow to specify S3 storage class for images (#6143)
Disk manager check chunk contents for zeroes (#54)
[DM] Add EstimatedBytesToRead() method to Source interface (#4384)
[Disk Manager] add BaseDiskIdPrefix to pools config; add ProxyOverlayDiskIdPrefix to dataplane config (#1573)
NBS-4684: [Disk Manager] use proxy overlay disks in relocation if possible (#350)