Allow avatar replacement alongside downloads and correct join fixtures

tests/test_chat_join_e2e.c

@@ -308,9 +308,9 @@ static void member_put_self(struct UTUN_INSTANCE* inst, const char* name) {
 }
 
 static void member_put_placeholder(struct UTUN_INSTANCE* inst, int idx, const char* name) {
-    char userinfo[256]; snprintf(userinfo, sizeof(userinfo), "{\"name\":\"%s\"}", name);
-    member_sync_put(inst, g_sh.ch_id, g_sh.nid[idx], g_sh.x_pub[idx], g_sh.ed_pub[idx],
-                    NULL, 0, NULL, 0, userinfo, NULL, NULL, 0, 0, NULL);
+    (void)name;
+    if (topo_node_sqlite_member_placeholder_put(inst->topo_sqlite_db, g_sh.ch_id, g_sh.nid[idx], g_sh.x_pub[idx], g_sh.ed_pub[idx]) < 0)
+        DEBUG_ERROR(DEBUG_CATEGORY_MEMBER_SYNC, "test: cannot create member placeholder node=%016llx", (unsigned long long)g_sh.nid[idx]);
 }
 
 /* C специально откладывает обработку KEY_REGISTER. Ссылки до этого момента быть не должно. */