refactor(domain): delegate OrgId Display, rename to_uuid, mark new must_use

crates/domain/src/id.rs

@@ -13,6 +13,7 @@ pub struct OrgId(Uuid);
 
 impl OrgId {
     /// Generate a fresh random id.
+    #[must_use = "generating an OrgId and discarding it is almost certainly a mistake"]
     pub fn new() -> Self {
         Self(Uuid::new_v4())
     }
@@ -22,8 +23,8 @@ impl OrgId {
         Self(uuid)
     }
 
-    /// The underlying [`Uuid`].
+    /// Return the underlying [`Uuid`].
-    pub fn as_uuid(&self) -> Uuid {
+    pub fn to_uuid(&self) -> Uuid {
         self.0
     }
 }
@@ -36,7 +37,7 @@ impl Default for OrgId {
 
 impl fmt::Display for OrgId {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.0)
+        fmt::Display::fmt(&self.0, f)
     }
 }