feat(storage): adopt the uniform storage schema v2 (tinystoragedrivers v1.0.0)

Cargo.toml

@@ -69,12 +69,12 @@ tinybox-ssh = { path = "crates/tinybox-ssh", version = "0.1.25" }
 tinybox-sync = { path = "crates/tinybox-sync", version = "0.1.25" }
 # The storage ports only (no database client), by git tag so a host that vendors
 # tinystoragedrivers once can `[patch]` it. Used by `tinybox-drivers`.
-tinystoragedrivers-core = { version = ">=0.8.0, <1", git = "https://github.com/tinyhumansai/tinystoragedrivers", tag = "v0.11.0" }
+tinystoragedrivers-core = { version = "1.0.0", git = "https://github.com/tinyhumansai/tinystoragedrivers", tag = "v1.0.0" }
 # The module reaches the host's storage over the storage bus: the proxy yields
 # the same port traits a linked library gets. The client crate serves them in
 # tests.
-tinystoragedrivers-busproxy = { version = ">=0.8.0, <1", git = "https://github.com/tinyhumansai/tinystoragedrivers", tag = "v0.11.0" }
-tinystoragedrivers-client = { version = ">=0.8.0, <1", git = "https://github.com/tinyhumansai/tinystoragedrivers", tag = "v0.11.0" }
+tinystoragedrivers-busproxy = { version = "1.0.0", git = "https://github.com/tinyhumansai/tinystoragedrivers", tag = "v1.0.0" }
+tinystoragedrivers-client = { version = "1.0.0", git = "https://github.com/tinyhumansai/tinystoragedrivers", tag = "v1.0.0" }
 tinybox-drivers = { path = "crates/tinybox-drivers", version = "0.1.32" }
 
 # Lints apply to every crate in the workspace via `[lints] workspace = true`.

crates/tinybox-bus/Cargo.toml

@@ -10,10 +10,21 @@ repository.workspace = true
 [dependencies]
 # The bus boundary contains data only; serialization is its sole dependency.
 serde.workspace = true
+# Only the `storage` feature: the schema the host composes. Ports only (no
+# backend, no I/O), pure JSON steps.
+serde_json = { workspace = true, optional = true }
+tinystoragedrivers-core = { workspace = true, optional = true }
+
+[features]
+default = []
+# `storage_schema()` and its pure v1 to v2 steps. Off by default so the
+# contract's default dependency closure stays serde only; a host enables it.
+storage = ["dep:serde_json", "dep:tinystoragedrivers-core"]
 
 [dev-dependencies]
-# Round-trip tests pin the serialized public vocabulary.
 serde_json.workspace = true
+# Migration tests run the steps over `MemoryStorage`.
+tokio = { workspace = true }
 
 [lints]
 workspace = true