refactor(crypto): move Integrable trait to arbiter-crypto

server/crates/arbiter-crypto/src/integrity.rs

@@ -0,0 +1,6 @@
+use crate::hashing::Hashable;
+
+pub trait Integrable: Hashable {
+    const KIND: &'static str;
+    const VERSION: i32 = 1;
+}

server/crates/arbiter-crypto/src/lib.rs

@@ -1,6 +1,7 @@
 #[cfg(feature = "authn")]
 pub mod authn;
 pub mod hashing;
+pub mod integrity;
 #[cfg(feature = "safecell")]
 pub mod safecell;