fix(build): 修复网关构建失败并收口候选选择与 finalize 回归

- 补齐 DecisionTraceCandidate 新增字段，修复审计测试构造
- 修正 usage 内存仓库的 created_at_unix_ms 字段引用与秒/毫秒换算
- 将 build_minimal_candidate_selection 重构为输入对象，消除 clippy 参数过多问题
- 修复 admin global model created_at 旧字段残留引用
- 修复 openai:cli 与 openai:compact 同家族 finalize 在 needs_conversion=true 时的成功回落逻辑
- 清理 aether-gateway 中的 derive/default 与 needless borrow 等 clippy 问题

apps/aether-gateway/src/ai_pipeline/planner/candidate_affinity.rs

@@ -192,7 +192,7 @@ async fn resolve_tunnel_owner_affinity_from_transport(
     state: PlannerAppState<'_>,
     transport: &GatewayProviderTransportSnapshot,
 ) -> TunnelOwnerAffinityBucket {
-    let Some(proxy) = resolve_transport_proxy_snapshot(&transport) else {
+    let Some(proxy) = resolve_transport_proxy_snapshot(transport) else {
         return TunnelOwnerAffinityBucket::Neutral;
     };
     if proxy.enabled == Some(false) {

apps/aether-gateway/src/ai_pipeline/planner/standard/openai/chat/decision/cross_format.rs

@@ -52,8 +52,7 @@ pub(super) async fn build_cross_format_local_openai_chat_decision_payload_for_ca
     else {
         return None;
     };
-    if !request_pair_allowed_for_transport(&transport, "openai:chat", provider_api_format.as_str())
-    {
+    if !request_pair_allowed_for_transport(transport, "openai:chat", provider_api_format.as_str()) {
         let skip_reason =
             if request_conversion_requires_enable_flag("openai:chat", provider_api_format.as_str())
                 && !transport.provider.enable_format_conversion