fix(ci): gate event crate doctest behind mem feature and apply rustfmt

The crate-root doctest used InMemoryEventBus/TypedEventBus (gated behind
the 'mem' feature), so `cargo test -p mytheclipse-event --no-default-features
--features amqp|nats` failed to compile the doctest (E0432). The example is
now no_run with the mem-dependent imports inside a #[cfg(feature="mem")]
main, so it compiles (and runs) when mem is on and degrades to an empty main
when off.

Also apply rustfmt to mytheclipse-config/dynamic.rs and
mytheclipse-storage/{gcs,s3}.rs to satisfy cargo fmt --all --check.

crates/mytheclipse-storage/src/gcs.rs

@@ -160,6 +160,9 @@ mod tests {
             .await
             .unwrap();
         assert_eq!(data, b"hello gcs");
-        storage.delete("mytheclipse-storage-test.txt").await.unwrap();
+        storage
+            .delete("mytheclipse-storage-test.txt")
+            .await
+            .unwrap();
     }
 }

crates/mytheclipse-storage/src/s3.rs

@@ -52,7 +52,8 @@ impl S3Storage {
         access_key: &str,
         secret_key: &str,
     ) -> Self {
-        let credentials = Credentials::new(access_key, secret_key, None, None, "mytheclipse-storage");
+        let credentials =
+            Credentials::new(access_key, secret_key, None, None, "mytheclipse-storage");
         let config = aws_sdk_s3::Config::builder()
             .region(Region::new(region.to_string()))
             .endpoint_url(endpoint)
@@ -322,13 +323,19 @@ mod tests {
         .await;
 
         storage
-            .put("mytheclipse-storage-test.txt", bytes_stream(b"hello s3".to_vec()))
+            .put(
+                "mytheclipse-storage-test.txt",
+                bytes_stream(b"hello s3".to_vec()),
+            )
             .await
             .unwrap();
         let data = read_to_vec(storage.get("mytheclipse-storage-test.txt").await.unwrap())
             .await
             .unwrap();
         assert_eq!(data, b"hello s3");
-        storage.delete("mytheclipse-storage-test.txt").await.unwrap();
+        storage
+            .delete("mytheclipse-storage-test.txt")
+            .await
+            .unwrap();
     }
 }