refactor(common): move Policy types from types.rs into policy.rs

common/src/lib.rs

@@ -1,2 +1,6 @@
 pub mod policy;
 pub mod types;
+
+// Convenience re-exports — Phase 1 clients imported these from `types`. Keep
+// the path stable to avoid churn in daemon/cli.
+pub use policy::{Firstrun, Policy, StackPolicy, Storage, StorageBackend};