first commit

middlewares/reject_all_middleware.go

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+package middlewares
+
+import (
+	"github.com/gofiber/fiber/v3"
+)
+
+// RejectAll middleware tüm gelen istekleri reddeder ve HTTP 500 döner.
+func RejectAll() fiber.Handler {
+	return func(c fiber.Ctx) error {
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "internal server error"})
+	}
+}