define TCS language and prove stage0 execution slice

broadcast-tower/module-registry.json

@@ -25,6 +25,12 @@
       "displayName": "最早光湖原生语言零件恢复与关系事件语法广播",
       "path": "broadcasts/20260821-historical-native-language-recovery.hldp",
       "state": "LOCAL_ONLY_RECONCILIATION_ACTIVE_RUNTIME_NOT_ACCEPTED"
+    },
+    {
+      "id": "HLP-MODULE-BROADCAST-20260821-0004",
+      "displayName": "TCS 统一语言规范、Stage-0 点火链与自举边界广播",
+      "path": "broadcasts/20260821-tcs-language-stage0-and-selfhost.hldp",
+      "state": "LOCAL_ONLY_STAGE0_EXECUTABLE_SELFHOST_PENDING"
     }
   ]
 }