fix: 号池列表统计与最后使用时间显示

- 为 usage 仓储新增按 provider_api_key_id 汇总请求数、Token、费用和最后使用时间的能力
- 在 /api/admin/pool/{provider_id}/keys 中优先使用 usage 汇总结果覆盖 request_count、total_tokens、total_cost_usd、last_used_at
- 补充数据层与网关侧回归测试，避免号池管理页统计全为 0 且最后使用为空

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

@@ -1,7 +1,7 @@
 mod types;
 
 pub use types::{
-    StoredProviderUsageSummary, StoredProviderUsageWindow, StoredRequestUsageAudit,
-    UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository, UsageRepository,
-    UsageWriteRepository,
+    StoredProviderApiKeyUsageSummary, StoredProviderUsageSummary, StoredProviderUsageWindow,
+    StoredRequestUsageAudit, UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository,
+    UsageRepository, UsageWriteRepository,
 };

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

@@ -279,6 +279,15 @@ pub struct StoredProviderUsageSummary {
     pub total_cost_usd: f64,
 }
 
+#[derive(Debug, Clone, PartialEq, Default, serde::Serialize, serde::Deserialize)]
+pub struct StoredProviderApiKeyUsageSummary {
+    pub provider_api_key_id: String,
+    pub request_count: u64,
+    pub total_tokens: u64,
+    pub total_cost_usd: f64,
+    pub last_used_at_unix_secs: Option<u64>,
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Default, serde::Serialize, serde::Deserialize)]
 pub struct UsageAuditListQuery {
     pub created_from_unix_secs: Option<u64>,
@@ -316,6 +325,14 @@ pub trait UsageReadRepository: Send + Sync {
         api_key_ids: &[String],
     ) -> Result<std::collections::BTreeMap<String, u64>, crate::DataLayerError>;
 
+    async fn summarize_usage_by_provider_api_key_ids(
+        &self,
+        provider_api_key_ids: &[String],
+    ) -> Result<
+        std::collections::BTreeMap<String, StoredProviderApiKeyUsageSummary>,
+        crate::DataLayerError,
+    >;
+
     async fn summarize_provider_usage_since(
         &self,
         provider_id: &str,

crates/aether-data/src/repository/usage/memory.rs

@@ -4,8 +4,9 @@ use std::sync::RwLock;
 use async_trait::async_trait;
 
 use super::{
-    StoredProviderUsageSummary, StoredProviderUsageWindow, StoredRequestUsageAudit,
-    UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository, UsageWriteRepository,
+    StoredProviderApiKeyUsageSummary, StoredProviderUsageSummary, StoredProviderUsageWindow,
+    StoredRequestUsageAudit, UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository,
+    UsageWriteRepository,
 };
 use crate::DataLayerError;
 
@@ -165,6 +166,46 @@ impl UsageReadRepository for InMemoryUsageReadRepository {
         Ok(totals)
     }
 
+    async fn summarize_usage_by_provider_api_key_ids(
+        &self,
+        provider_api_key_ids: &[String],
+    ) -> Result<BTreeMap<String, StoredProviderApiKeyUsageSummary>, DataLayerError> {
+        let provider_api_key_id_set = provider_api_key_ids
+            .iter()
+            .map(String::as_str)
+            .collect::<Vec<_>>();
+        let mut summaries = BTreeMap::<String, StoredProviderApiKeyUsageSummary>::new();
+        for item in self
+            .by_request_id
+            .read()
+            .expect("usage repository lock")
+            .values()
+        {
+            let Some(provider_api_key_id) = item.provider_api_key_id.as_deref() else {
+                continue;
+            };
+            if !provider_api_key_id_set.contains(&provider_api_key_id) {
+                continue;
+            }
+            let entry = summaries
+                .entry(provider_api_key_id.to_string())
+                .or_insert_with(|| StoredProviderApiKeyUsageSummary {
+                    provider_api_key_id: provider_api_key_id.to_string(),
+                    ..StoredProviderApiKeyUsageSummary::default()
+                });
+            entry.request_count = entry.request_count.saturating_add(1);
+            entry.total_tokens = entry.total_tokens.saturating_add(item.total_tokens);
+            entry.total_cost_usd += item.total_cost_usd;
+            entry.last_used_at_unix_secs = Some(
+                entry
+                    .last_used_at_unix_secs
+                    .unwrap_or(0)
+                    .max(item.created_at_unix_secs),
+            );
+        }
+        Ok(summaries)
+    }
+
     async fn summarize_provider_usage_since(
         &self,
         provider_id: &str,

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

@@ -3,9 +3,9 @@ mod sql;
 
 #[allow(unused_imports)]
 pub(crate) use aether_data_contracts::repository::usage::{
-    StoredProviderUsageSummary, StoredProviderUsageWindow, StoredRequestUsageAudit,
-    UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository, UsageRepository,
-    UsageWriteRepository,
+    StoredProviderApiKeyUsageSummary, StoredProviderUsageSummary, StoredProviderUsageWindow,
+    StoredRequestUsageAudit, UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository,
+    UsageRepository, UsageWriteRepository,
 };
 pub use memory::InMemoryUsageReadRepository;
 pub use sql::SqlxUsageReadRepository;

crates/aether-data/src/repository/usage/sql.rs

@@ -4,8 +4,8 @@ use sqlx::{PgPool, Postgres, QueryBuilder, Row};
 use uuid::Uuid;
 
 use super::{
-    StoredProviderUsageSummary, StoredRequestUsageAudit, UpsertUsageRecord, UsageAuditListQuery,
-    UsageReadRepository, UsageWriteRepository,
+    StoredProviderApiKeyUsageSummary, StoredProviderUsageSummary, StoredRequestUsageAudit,
+    UpsertUsageRecord, UsageAuditListQuery, UsageReadRepository, UsageWriteRepository,
 };
 use crate::postgres::PostgresTransactionRunner;
 use crate::{error::SqlxResultExt, DataLayerError};
@@ -154,6 +154,27 @@ GROUP BY api_key_id
 ORDER BY api_key_id ASC
 "#;
 
+const SUMMARIZE_USAGE_BY_PROVIDER_API_KEY_IDS_SQL: &str = r#"
+SELECT
+  provider_api_key_id,
+  COUNT(*)::BIGINT AS request_count,
+  COALESCE(
+    SUM(
+      COALESCE(
+        total_tokens,
+        COALESCE(input_tokens, 0) + COALESCE(output_tokens, 0)
+      )
+    ),
+    0
+  ) AS total_tokens,
+  COALESCE(CAST(SUM(total_cost_usd) AS DOUBLE PRECISION), 0) AS total_cost_usd,
+  CAST(EXTRACT(EPOCH FROM MAX(created_at)) AS BIGINT) AS last_used_at_unix_secs
+FROM "usage"
+WHERE provider_api_key_id = ANY($1::TEXT[])
+GROUP BY provider_api_key_id
+ORDER BY provider_api_key_id ASC
+"#;
+
 const LIST_USAGE_AUDITS_PREFIX: &str = r#"
 SELECT
   id,
@@ -645,6 +666,76 @@ impl SqlxUsageReadRepository {
         Ok(totals)
     }
 
+    pub async fn summarize_usage_by_provider_api_key_ids(
+        &self,
+        provider_api_key_ids: &[String],
+    ) -> Result<std::collections::BTreeMap<String, StoredProviderApiKeyUsageSummary>, DataLayerError>
+    {
+        if provider_api_key_ids.is_empty() {
+            return Ok(std::collections::BTreeMap::new());
+        }
+
+        let rows = sqlx::query(SUMMARIZE_USAGE_BY_PROVIDER_API_KEY_IDS_SQL)
+            .bind(provider_api_key_ids)
+            .fetch_all(&self.pool)
+            .await
+            .map_postgres_err()?;
+
+        let mut summaries = std::collections::BTreeMap::new();
+        for row in rows {
+            let provider_api_key_id: String =
+                row.try_get("provider_api_key_id").map_postgres_err()?;
+            let request_count = row
+                .try_get::<i64, _>("request_count")
+                .map_postgres_err()?
+                .try_into()
+                .map_err(|_| {
+                    DataLayerError::UnexpectedValue(
+                        "usage.request_count aggregate is negative".to_string(),
+                    )
+                })?;
+            let total_tokens = row
+                .try_get::<i64, _>("total_tokens")
+                .map_postgres_err()?
+                .try_into()
+                .map_err(|_| {
+                    DataLayerError::UnexpectedValue(
+                        "usage.total_tokens aggregate is negative".to_string(),
+                    )
+                })?;
+            let total_cost_usd: f64 = row.try_get("total_cost_usd").map_postgres_err()?;
+            if !total_cost_usd.is_finite() {
+                return Err(DataLayerError::UnexpectedValue(
+                    "usage.total_cost_usd aggregate is not finite".to_string(),
+                ));
+            }
+            let last_used_at_unix_secs = row
+                .try_get::<Option<i64>, _>("last_used_at_unix_secs")
+                .map_postgres_err()?
+                .map(|value| {
+                    value.try_into().map_err(|_| {
+                        DataLayerError::UnexpectedValue(
+                            "usage.last_used_at_unix_secs aggregate is negative".to_string(),
+                        )
+                    })
+                })
+                .transpose()?;
+
+            summaries.insert(
+                provider_api_key_id.clone(),
+                StoredProviderApiKeyUsageSummary {
+                    provider_api_key_id,
+                    request_count,
+                    total_tokens,
+                    total_cost_usd,
+                    last_used_at_unix_secs,
+                },
+            );
+        }
+
+        Ok(summaries)
+    }
+
     pub async fn upsert(
         &self,
         usage: UpsertUsageRecord,
@@ -762,6 +853,14 @@ impl UsageReadRepository for SqlxUsageReadRepository {
         Self::summarize_total_tokens_by_api_key_ids(self, api_key_ids).await
     }
 
+    async fn summarize_usage_by_provider_api_key_ids(
+        &self,
+        provider_api_key_ids: &[String],
+    ) -> Result<std::collections::BTreeMap<String, StoredProviderApiKeyUsageSummary>, DataLayerError>
+    {
+        Self::summarize_usage_by_provider_api_key_ids(self, provider_api_key_ids).await
+    }
+
     async fn summarize_provider_usage_since(
         &self,
         provider_id: &str,
@@ -975,6 +1074,14 @@ mod tests {
         assert!(super::SUMMARIZE_TOTAL_TOKENS_BY_API_KEY_IDS_SQL.contains("ANY($1::TEXT[])"));
     }
 
+    #[test]
+    fn usage_sql_summarizes_usage_by_provider_api_key_ids_in_database() {
+        assert!(super::SUMMARIZE_USAGE_BY_PROVIDER_API_KEY_IDS_SQL
+            .contains("GROUP BY provider_api_key_id"));
+        assert!(super::SUMMARIZE_USAGE_BY_PROVIDER_API_KEY_IDS_SQL.contains("MAX(created_at)"));
+        assert!(super::SUMMARIZE_USAGE_BY_PROVIDER_API_KEY_IDS_SQL.contains("ANY($1::TEXT[])"));
+    }
+
     #[test]
     fn usage_sql_supports_recent_usage_audits_query() {
         assert!(super::LIST_RECENT_USAGE_AUDITS_PREFIX.contains("FROM \"usage\""));