feat: Add request id middleware test

internal/pkg/middleware/requestid.go

@@ -0,0 +1,9 @@
+package middleware
+
+import "github.com/gin-gonic/gin"
+
+func RequestID() gin.HandlerFunc {
+	return func(ctx *gin.Context) {
+		ctx.Set("X-Request-Id", "123")
+	}
+}