修复 AGC 本地 BgFilter worker 启动链路

backend 模式复用 Rust 双进程启动与 watcher

AGC 后端复用门禁增加 BgFilter worker readiness

补充启动编排与 ready 门禁回归测试

同步本地开发运维文档

scripts/dev.mjs

@@ -1619,9 +1619,8 @@ class DevRunner {
 
     if (command === 'backend') {
       await this.startSpacetimeForFullStack();
-      await this.services.get('api-server').start();
-      await this.waitForApiServer();
-      this.startWatchers(['spacetime', 'api-server']);
+      await this.startRustServicePair();
+      this.startWatchers(['spacetime', 'api-server', 'bgfilter-worker']);
       return;
     }