Refactor SQL query in Worker to improve distance calculations: Replace the existing LEFT JOIN with a LATERAL join to enhance the selection of region distances based on transport mode, ensuring more accurate results. Update polling frequency in TransportWorker from once per second to once per minute for better resource management.

src/worker/transport.rs

@@ -51,8 +51,8 @@ impl TransportWorker {
                 eprintln!("[TransportWorker] Fehler in process_arrived_transports: {err}");
             }
 
-            // Einmal pro Sekunde prüfen
-            for _ in 0..1 {
+            // Minütlich prüfen (nicht sekündlich pollen)
+            for _ in 0..60 {
                 if !state.running_worker.load(Ordering::Relaxed) {
                     break;
                 }