Merge branch 'main' into 'feature/results'

# Conflicts:
#   go.sum

cmd/user/main.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"datarush/internal/user/config"
+	"datarush/internal/user/server"
+)
+
+func main() {
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("failed to load config: %v", err)
+	}
+
+	srv := server.New(cfg)
+
+	if err := srv.Start(); err != nil {
+		log.Fatalf("failed to start server: %v", err)
+	}
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	log.Println("shutting down user server...")
+	srv.Stop()
+	log.Println("user server stopped")
+}