add: app_data api

crates/shared/src/hash.rs

@@ -33,6 +33,18 @@ pub fn salt() -> String {
         .collect()
 }
 
+pub fn salt_len(len: usize) -> String {
+    rng()
+        .sample_iter(&Alphanumeric)
+        .take(len)
+        .map(char::from)
+        .collect()
+}
+
 pub fn random_id() -> String {
     hash(uuid())
 }
+
+pub fn random_id_salted_len(len: usize) -> String {
+    hash(uuid() + &salt_len(len))
+}