implemented foundational API routes (/articles, /summaries) using Axum, added graceful shutdown handling, improved database initialization with connection pooling and directory creation, and integrated tracing for logging

backend-rust/src/api.rs

@@ -1,3 +1,3 @@
-mod handlers;
-mod middleware;
-mod routes;
+pub mod handlers;
+pub mod middleware;
+pub mod routes;