style(benchmarks-website): cargo +nightly fmt

`cargo +nightly fmt` re-orders the use statements in
`api/mod.rs` so the public re-exports are interleaved with the
crate-private ones in alphabetical order across visibility
modifiers, which is what nightly rustfmt's StdExternalCrate
group_imports configuration produces.

Signed-off-by: Claude <noreply@anthropic.com>

Author: claude

benchmarks-website/server/src/api/mod.rs

@@ -32,6 +32,8 @@ use axum::extract::State;
 use axum::response::IntoResponse;
 use duckdb::Connection;
 
+pub(crate) use self::charts::chart_payload;
+pub(crate) use self::charts::collect_group_charts;
 pub use self::dto::ChartLink;
 pub use self::dto::ChartResponse;
 pub use self::dto::CommitPoint;
@@ -50,11 +52,9 @@ pub use self::dto::SeriesTag;
 pub use self::dto::Summary;
 pub use self::dto::group_sort_key;
 pub use self::filter::collect_filter_universe;
+pub(crate) use self::groups::collect_groups;
 pub use self::window::ChartQuery;
 pub use self::window::CommitWindow;
-pub(crate) use self::charts::chart_payload;
-pub(crate) use self::charts::collect_group_charts;
-pub(crate) use self::groups::collect_groups;
 use crate::app::AppState;
 use crate::db;
 use crate::error::ApiError;