agent
d6e668b984
Branch-by-abstraction for the blob store (issue 0003d): media ciphertext can live in a replicated JetStream Object Store instead of local disk, so a blob uploaded to one node survives a node loss and is reachable from any node. pkg/blobstore: - Store is now an interface (Put/Get/Has). The filesystem backend is renamed diskStore and stays the default: New(dir) returns it. - objectStore (new) implements Store over a NATS Object Store bucket with a configurable replication factor (R1..R5), matching the KV store's R1->R3 rollout. Content-addressing (sha256-hex) is identical, so the wire contract is unchanged. pkg/membership: - Server.blobs and NewServer take the blobstore.Store interface instead of the concrete type; no behavior change with the disk default. Tests (DoD: golden + edge + contract): - TestObjectStoreRoundTrip: put/get/has + content-addressed dedup. - TestObjectStoreMissing: unknown hash is absent and unreadable. - TestObjectStoreAddressMatchesDisk: the Object Store and disk backends address identical bytes to the IDENTICAL hash (portable blob refs). Like the KV store (0003b), wiring membershipd to select the Object Store is deferred to the decentralized boot path (flag off); disk stays default.