Chore/more error macros (#2686)

* cleaned up MixProcessingError

* Added Error impl to (hopefully) all error enums in the codebase

* Replaced all occurences of error("{0}") with error(transparent)

* Changelog entry

gateway/src/node/storage/mod.rs

@@ -173,13 +173,13 @@ impl PersistentStorage {
         let connection_pool = match sqlx::SqlitePool::connect_with(opts).await {
             Ok(db) => db,
             Err(err) => {
-                error!("Failed to connect to SQLx database: {}", err);
+                error!("Failed to connect to SQLx database: {err}");
                 return Err(err.into());
             }
         };
 
         if let Err(err) = sqlx::migrate!("./migrations").run(&connection_pool).await {
-            error!("Failed to perform migration on the SQLx database: {}", err);
+            error!("Failed to perform migration on the SQLx database: {err}");
             return Err(err.into());
         }