优化加载后删除节点的逻辑；和数据库查询性能

sync_state_machine/common/collection.py

@@ -488,6 +488,7 @@ class DataCollection:
                     context=context_value,
                 )
                 node.context["_loaded_from_persistence"] = True
+                node.append_log("加载来源: persistence 恢复节点")
             except Exception:
                 import logging
                 logger = logging.getLogger(__name__)
@@ -623,6 +624,7 @@ class DataCollection:
                 context=context_value,
             )
             node.context["_loaded_from_persistence"] = True
+            node.append_log("加载来源: persistence 恢复节点")
             self._nodes[node.node_id] = node
 
             if node.data_id and node.data_id != "":

sync_state_machine/common/persistence_backends/sqlite_backend.py

@@ -112,6 +112,9 @@ class SQLitePersistenceBackend(PersistenceBackend):
         await self.conn.execute(
             "CREATE INDEX IF NOT EXISTS idx_nodes_collection_scope_data_id ON nodes (collection_id, scope, data_id)"
         )
+        await self.conn.execute(
+            "CREATE INDEX IF NOT EXISTS idx_nodes_scope_type_node_id ON nodes (scope, node_type, node_id)"
+        )
 
     async def _ensure_bindings_schema(self) -> None:
         assert self.conn is not None