chore: Fix building the Rust password_manager example (#267)

The password_manager example failed to build because the `backend`
symlink points to a canister that uses workspace dependency inheritance
({ workspace = true }), but the example's own workspace didn't define
`[workspace.dependencies]`.

Fixed by adding the required workspace dependencies to both the
example's `Cargo.toml` and the root `Cargo.toml`, and updating the
canister to use workspace inheritance for ic-vetkeys.

Author: randombit

Cargo.toml

@@ -26,6 +26,7 @@ candid = "0.10.16"
 hex = "0.4.3"
 ic-cdk = "0.19.0"
 ic-stable-structures = "0.7.0"
+ic-vetkeys = { path = "backend/rs/ic_vetkeys" }
 lazy_static = "1.5.0"
 pocket-ic = "9.0.0"
 rand = "0.8.5"

backend/rs/canisters/ic_vetkeys_encrypted_maps_canister/Cargo.toml

@@ -17,7 +17,7 @@ candid = "0.10.2"
 ic-cdk = { workspace = true }
 ic-dummy-getrandom-for-wasm = "0.1.0"
 ic-stable-structures = { workspace = true }
-ic-vetkeys = { path = "../../ic_vetkeys" }
+ic-vetkeys = { workspace = true }
 serde = "1.0.217"
 
 [dev-dependencies]