style: format seluruh workspace dengan cargo fmt

Menyeragamkan format kode sesuai rustfmt (126 file). Sebelumnya
lefthook pre-commit 'cargo fmt --check' akan gagal pada commit apa pun.

apps/interfaces/api/src/lib.rs

@@ -31,8 +31,8 @@ pub mod state;
 pub use error::ApiError;
 pub use state::ApiState;
 
-use std::sync::Arc;
 use axum::Router;
+use std::sync::Arc;
 use tower_http::cors::CorsLayer;
 
 /// Build the API router with all routes registered.
@@ -64,10 +64,7 @@ pub fn build_router(state: ApiState) -> Router {
     Router::new()
         .nest("/api/v1/auth", auth_router())
         .nest("/api/v1/health", health_router())
-        .nest(
-            "/api/v1",
-            protected_router().layer(jwt_auth),
-        )
+        .nest("/api/v1", protected_router().layer(jwt_auth))
         .layer(cors)
         .with_state(shared_state)
 }
@@ -89,7 +86,10 @@ fn protected_router() -> Router<Arc<ApiState>> {
     let sessions_router = Router::new()
         .route("/", axum::routing::get(sessions::list_sessions_handler))
         .route("/", axum::routing::post(sessions::create_session_handler))
-        .route("/{id}", axum::routing::delete(sessions::delete_session_handler))
+        .route(
+            "/{id}",
+            axum::routing::delete(sessions::delete_session_handler),
+        )
         // Conversations are sub-resources of sessions
         .route(
             "/{id}/conversations",