feat: rustc and clippy linting

server/crates/arbiter-crypto/src/authn/v1.rs

@@ -35,6 +35,7 @@ impl PublicKey {
         self.0.encode().0.to_vec()
     }
 
+    #[must_use]
     pub fn verify(&self, nonce: i32, context: &[u8], signature: &Signature) -> bool {
         self.0.verify_with_context(
             &format_challenge(nonce, &self.to_bytes()),

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

@@ -49,7 +49,7 @@ impl<T: Hashable + PartialOrd> Hashable for Vec<T> {
     }
 }
 
-impl<T: Hashable + PartialOrd> Hashable for HashSet<T> {
+impl<T: Hashable + PartialOrd, S: std::hash::BuildHasher> Hashable for HashSet<T, S> {
     fn hash<H: Digest>(&self, hasher: &mut H) {
         let ref_sorted = {
             let mut sorted = self.iter().collect::<Vec<_>>();

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

@@ -29,7 +29,7 @@ pub trait SafeCellHandle<T> {
         let mut cell = Self::new(T::default());
         {
             let mut handle = cell.write();
-            f(handle.deref_mut());
+            f(&mut *handle);
         }
         cell
     }