Add endpoint to download multidata directly

ALttPRandomizer/SeedController.cs

@@ -72,6 +72,19 @@
             return ResolveResult(await this.RandomizeService.RetryMulti(id));
         }
 
+        [Route("/multidata/{id}")]
+        [HttpGet]
+        public async Task<ActionResult> GetMultidata(string id) {
+            var multidata = await this.SeedService.GetMultidata(id);
+            if (multidata == null) {
+                return NotFound("multidata not found");
+            } else {
+                return new FileContentResult(multidata.ToArray(), "application/octet-stream") {
+                    FileDownloadName = $"{id}_multidata",
+                };
+            }
+        }
+
         private ActionResult ResolveResult(IDictionary<string, object> result) {
             if (result.TryGetValue("status", out var responseCode)) {
                 if (responseCode is int code) {