fix(gateway): 修复 local finalize 与 usage 聚合相关测试失败

- 修正内存 usage 仓库的时间单位处理，恢复 stats/monitoring/dashboard/wallet/pool 聚合结果
- 允许 openai:compact 走 CLI 响应转换与本地 finalize cross-format 路径
- 更新 cross-format 测试夹具，显式启用 enable_format_conversion
- 调整 failover 测试优先级，消除候选平局导致的顺序不稳定
- 补齐 ai_pipeline 架构断言所需导入并清理残留 runtime 空目录

apps/aether-gateway/src/tests/ai_execute/stream/decision.rs

@@ -116,7 +116,7 @@ async fn gateway_executes_openai_chat_stream_via_local_decision_gate_without_exe
         .with_transport_fields(
             true,
             false,
-            false,
+            true,
             None,
             Some(2),
             None,
@@ -540,7 +540,7 @@ async fn gateway_executes_openai_chat_stream_via_local_openai_cli_cross_format_c
         .with_transport_fields(
             true,
             false,
-            false,
+            true,
             None,
             Some(2),
             None,
@@ -1762,7 +1762,7 @@ async fn gateway_retries_next_local_openai_chat_stream_candidate_with_local_fail
                 "provider-openai-local-stream-backup",
                 "endpoint-openai-local-stream-backup",
                 "key-openai-local-stream-backup",
-                10,
+                20,
                 2,
                 "gpt-5-upstream-backup",
             ),