feat(admin): 将用户管理的用量统计改为全量累计口径 (#314)

- 新增按用户 ID 批量汇总 usage 的后端查询
- 在 /api/admin/users 中返回 request_count 和 total_tokens
- 移除用户管理页面额外的 usage 聚合请求
- 为管理端用户列表补充累计统计回归测试

crates/aether-data-contracts/src/repository/usage/mod.rs

@@ -9,10 +9,10 @@ pub use types::{
     StoredUsageDashboardDailyBreakdownRow, StoredUsageDashboardProviderCount,
     StoredUsageDashboardSummary, StoredUsageErrorDistributionRow, StoredUsageLeaderboardSummary,
     StoredUsagePerformancePercentilesRow, StoredUsageSettledCostSummary,
-    StoredUsageTimeSeriesBucket, UpsertUsageRecord, UsageAuditAggregationGroupBy,
-    UsageAuditAggregationQuery, UsageAuditKeywordSearchQuery, UsageAuditListQuery,
-    UsageAuditSummaryQuery, UsageBodyCaptureResult, UsageBodyCaptureState, UsageBodyCaptureStorage,
-    UsageBodyField, UsageBreakdownGroupBy, UsageBreakdownSummaryQuery,
+    StoredUsageTimeSeriesBucket, StoredUsageUserTotals, UpsertUsageRecord,
+    UsageAuditAggregationGroupBy, UsageAuditAggregationQuery, UsageAuditKeywordSearchQuery,
+    UsageAuditListQuery, UsageAuditSummaryQuery, UsageBodyCaptureResult, UsageBodyCaptureState,
+    UsageBodyCaptureStorage, UsageBodyField, UsageBreakdownGroupBy, UsageBreakdownSummaryQuery,
     UsageCacheAffinityHitSummaryQuery, UsageCacheAffinityIntervalGroupBy,
     UsageCacheAffinityIntervalQuery, UsageCacheHitSummaryQuery, UsageCostSavingsSummaryQuery,
     UsageDailyHeatmapQuery, UsageDashboardDailyBreakdownQuery, UsageDashboardProviderCountsQuery,

crates/aether-data-contracts/src/repository/usage/types.rs

@@ -709,6 +709,13 @@ pub struct StoredUsageAuditSummary {
     pub error_requests: u64,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, Default, serde::Serialize, serde::Deserialize)]
+pub struct StoredUsageUserTotals {
+    pub user_id: String,
+    pub request_count: u64,
+    pub total_tokens: u64,
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Default, serde::Serialize, serde::Deserialize)]
 pub struct UsageCacheHitSummaryQuery {
     pub created_from_unix_secs: u64,
@@ -1279,6 +1286,11 @@ pub trait UsageReadRepository: Send + Sync {
         query: &UsageAuditSummaryQuery,
     ) -> Result<StoredUsageAuditSummary, crate::DataLayerError>;
 
+    async fn summarize_usage_totals_by_user_ids(
+        &self,
+        user_ids: &[String],
+    ) -> Result<Vec<StoredUsageUserTotals>, crate::DataLayerError>;
+
     async fn summarize_usage_cache_hit_summary(
         &self,
         query: &UsageCacheHitSummaryQuery,