clippy fix

src/error.rs

@@ -121,6 +121,7 @@ impl Error {
         }
     }
 
+    #[must_use]
     pub fn get_invalid_param(&self) -> Option<&Parameter> {
         if let Self::InvalidParameter(p) = self {
             Some(p)

src/sharry/uri.rs

@@ -3,6 +3,12 @@ use std::fmt;
 use log::trace;
 use serde::{Deserialize, Serialize};
 
+/// ID of a file in a Sharry share
+///
+/// - impl `Clone` as this is just a String
+/// - impl `serde` for cachefile handling
+/// - impl `Display` for formatting compatibility
+/// - impl `AsRef<[u8]>` for hashing with `blake2b_simd`
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Uri(String);