chore: fix all clippy warnings across workspace

crates/quicproquo-core/src/hybrid_kem.rs

@@ -476,6 +476,7 @@ fn derive_aead_key(x25519_ss: &[u8], mlkem_ss: &[u8], extra_info: &[u8]) -> Key
 // ── Tests ───────────────────────────────────────────────────────────────────
 
 #[cfg(test)]
+#[allow(clippy::unwrap_used)]
 mod tests {
     use super::*;