refactor: improve logs, unify integration log fmt

The catch-all case of `handle_client_message` now logs the atom's name
instead of its opaque atom id.

`get_atom_name` now warns there was an error and returns a filler name.
Since most the use of `get_atom_name` is in logging, this makes those
logs easier to read.

The integration tests now use `formatted_timed_builder` logger
constructor, which should unify the look of logs between the integration
tests and the main binary.

src/xstate/mod.rs

@@ -590,7 +590,10 @@ impl XState {
                     }
                 }
             }
-            t => warn!("unrecognized message: {t:?}"),
+            t => warn!(
+                "unrecognized message: {:?}",
+                get_atom_name(&self.connection, t)
+            ),
         }
     }
 
@@ -1415,6 +1418,9 @@ impl XConnection for RealConnection {
 fn get_atom_name(connection: &xcb::Connection, atom: x::Atom) -> String {
     match connection.wait_for_reply(connection.send_request(&x::GetAtomName { atom })) {
         Ok(reply) => reply.name().to_string(),
-        Err(err) => format!("<error getting atom name: {err:?}> {atom:?}"),
+        Err(err) => {
+            warn!("<error getting atom name: {err:?}> {atom:?}");
+            format!("ATOM_{}", atom.resource_id())
+        }
     }
 }