chore: fix all clippy warnings across workspace

crates/quicproquo-core/benches/crypto_benchmarks.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::unwrap_used)]
 //! Benchmark: Identity keypair operations, sealed sender, and message padding.
 //!
 //! Covers:
@@ -34,14 +35,12 @@ fn bench_identity_verify(c: &mut Criterion) {
 
     c.bench_function("identity_verify", |b| {
         b.iter(|| {
-            black_box(
-                IdentityKeypair::verify_raw(
-                    black_box(&pk),
-                    black_box(payload),
-                    black_box(&sig),
-                )
-                .unwrap()
+            IdentityKeypair::verify_raw(
+                black_box(&pk),
+                black_box(payload),
+                black_box(&sig),
             )
+            .unwrap();
         });
     });
 }

crates/quicproquo-core/benches/hybrid_kem_bench.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::unwrap_used)]
 //! Benchmark: Hybrid KEM (X25519 + ML-KEM-768) vs classical-only encryption.
 //!
 //! Compares keypair generation, encryption, and decryption times for the

crates/quicproquo-core/benches/mls_operations.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::unwrap_used)]
 //! Benchmark: MLS group operations at various group sizes.
 //!
 //! Measures KeyPackage generation, group creation, member addition,

crates/quicproquo-core/benches/serialization.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::unwrap_used)]
 //! Benchmark: Cap'n Proto vs Protobuf serialization for chat message envelopes.
 //!
 //! Compares serialization/deserialization speed and encoded size at three