f61ef2aa9e
internal/backup/backup.go: Backup (tar.gz + HMAC-SHA256 signature, excludes /run/orca + sockets + WAL/SHM), VerifySignature, Restore (signature verify + extract + Force flag). internal/cli/backup.go: orca backup --out + orca restore --in --force. Tests: round-trip, signature mismatch, exclusion, force-refuse, force-overwrite. ---ci--- project: orca phase: 04 milestone: v0.11 status: execute ---/ci---