feat: 进一步优化乐观缓存和同步配置的逻辑

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.328",
+  "version": "2.14.329",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {

backend/src/restful/sync.js

@@ -508,6 +508,7 @@ async function syncArtifacts() {
                         await produceArtifact({
                             type: 'subscription',
                             name: subName,
+                            awaitCustomCache: true,
                         });
                     } catch (e) {
                         // $.error(`${e.message ?? e}`);