fix(gateway): 修复 balance 刷新去重键冲突、usage 状态回退与测试竞态

- balance_cache: 引入实例级 refresh key 防止多实例共享进程级 HashSet 冲突
- InMemoryUsageRepo: 阻止 pending/streaming 状态覆盖已终结(completed/failed/cancelled)记录
- usage 同步测试: 等待条件从 is_some() 改为检查 status=="completed" 避免竞态
- wallet 测试: 增加轮询等待 wallet 扣款完成
- 整理 import 语句与 tests 模块位置

apps/aether-gateway/src/handlers/admin/observability/usage/analytics/mod.rs

@@ -4,4 +4,5 @@ mod filters;
 
 pub(super) use aggregations::admin_usage_aggregation_by_user_json;
 pub(super) use cache_affinity::list_recent_completed_usage_for_cache_affinity;
-pub(super) use filters::{admin_usage_api_key_names, admin_usage_provider_key_names};
+pub(super) use filters::admin_usage_api_key_names;
+pub(super) use filters::admin_usage_provider_key_names;

apps/aether-gateway/src/handlers/admin/observability/usage/detail_routes.rs

@@ -1,4 +1,5 @@
-use super::analytics::{admin_usage_api_key_names, admin_usage_provider_key_names};
+use super::analytics::admin_usage_api_key_names;
+use super::analytics::admin_usage_provider_key_names;
 use super::replay::{
     admin_usage_curl_headers, admin_usage_curl_url, admin_usage_headers_from_value,
     admin_usage_id_from_action_path, admin_usage_id_from_detail_path,

apps/aether-gateway/src/handlers/admin/observability/usage/replay.rs

@@ -107,40 +107,6 @@ pub(super) fn build_admin_usage_curl_response(
     )
 }
 
-#[cfg(test)]
-mod tests {
-    use super::admin_usage_body_value_from_sources;
-    use serde_json::json;
-
-    #[test]
-    fn resolved_reference_body_wins_over_inline_fallback() {
-        let inline_body = json!({
-            "truncated": true,
-            "reason": "usage_capture_limits_exceeded"
-        });
-        let ref_body = json!({
-            "messages": [{"role": "user", "content": "real request body"}]
-        });
-
-        assert_eq!(
-            admin_usage_body_value_from_sources(Some(ref_body.clone()), Some(&inline_body)),
-            Some(ref_body)
-        );
-    }
-
-    #[test]
-    fn inline_body_is_used_when_reference_body_is_unavailable() {
-        let inline_body = json!({
-            "messages": [{"role": "user", "content": "fallback inline body"}]
-        });
-
-        assert_eq!(
-            admin_usage_body_value_from_sources(None, Some(&inline_body)),
-            Some(inline_body)
-        );
-    }
-}
-
 pub(super) fn build_admin_usage_detail_payload(
     item: &StoredRequestUsageAudit,
     users_by_id: &BTreeMap<String, aether_data::repository::users::StoredUserSummary>,
@@ -415,3 +381,37 @@ pub(super) fn admin_usage_build_curl_command(
 ) -> String {
     aether_admin::observability::usage::admin_usage_build_curl_command(url, headers, body)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::admin_usage_body_value_from_sources;
+    use serde_json::json;
+
+    #[test]
+    fn resolved_reference_body_wins_over_inline_fallback() {
+        let inline_body = json!({
+            "truncated": true,
+            "reason": "usage_capture_limits_exceeded"
+        });
+        let ref_body = json!({
+            "messages": [{"role": "user", "content": "real request body"}]
+        });
+
+        assert_eq!(
+            admin_usage_body_value_from_sources(Some(ref_body.clone()), Some(&inline_body)),
+            Some(ref_body)
+        );
+    }
+
+    #[test]
+    fn inline_body_is_used_when_reference_body_is_unavailable() {
+        let inline_body = json!({
+            "messages": [{"role": "user", "content": "fallback inline body"}]
+        });
+
+        assert_eq!(
+            admin_usage_body_value_from_sources(None, Some(&inline_body)),
+            Some(inline_body)
+        );
+    }
+}

apps/aether-gateway/src/handlers/admin/observability/usage/summary_routes.rs

@@ -1,5 +1,6 @@
 use super::super::stats::{AdminStatsTimeRange, AdminStatsUsageFilter};
-use super::analytics::{admin_usage_api_key_names, admin_usage_provider_key_names};
+use super::analytics::admin_usage_api_key_names;
+use super::analytics::admin_usage_provider_key_names;
 use crate::handlers::admin::request::{AdminAppState, AdminRequestContext};
 use crate::handlers::admin::shared::query_param_value;
 use crate::GatewayError;