Implements the Git LFS custom-transfer-agent protocol (init/upload/download/
terminate over stdin/stdout JSON), storing large file content in a local
IPFS (Kubo) daemon rather than a central server. The oid to CID mapping is
carried in git notes on refs/notes/rad-lfs, keyed by each LFS pointer's own
git blob hash, so it replicates with the repository via normal git sync.
Companion to the rad lfs init / seed / unseed support in the paired
heartwood fork.
Maciek "mab122" Bator