feat(access-logs): 上报并展示边缘缓存状态 cache_status

OpenResty 日志输出 $upstream_cache_status；Agent/协议/ClickHouse 贯通入库。
明细列表与详情按 HIT/MISS 等推导命中、回源、未缓存三态标签。

internal/repository/analytics/node_access_log.go

@@ -36,7 +36,7 @@ func ListNodeAccessLogs(ctx context.Context, filter NodeAccessLogFilter) ([]anal
 	clause, args := buildNodeAccessLogFilterClause(filter)
 	tableName := nodeAccessLogTableName()
 	sql := fmt.Sprintf(`
-SELECT id, node_id, logged_at, remote_addr, region, host, path, user_agent, status_code, bytes_sent, request_length, request_time_ms, created_at
+SELECT id, node_id, logged_at, remote_addr, region, host, path, user_agent, cache_status, status_code, bytes_sent, request_length, request_time_ms, created_at
 FROM %s
 WHERE %s
 ORDER BY %s`, tableName, clause, nodeAccessLogOrderClause(filter.SortBy, filter.SortOrder))
@@ -69,6 +69,7 @@ func scanNodeAccessLogRows(rows driver.Rows) ([]analyticsmodel.NodeAccessLog, er
 			&item.Host,
 			&item.Path,
 			&item.UserAgent,
+			&item.CacheStatus,
 			&item.StatusCode,
 			&item.BytesSent,
 			&item.RequestLength,

internal/repository/analytics/node_access_log_test.go

@@ -49,9 +49,10 @@ func TestBatchInsertNodeAccessLogs_UsesModelBatchSQL(t *testing.T) {
 	assert.True(t, mockBatch.sendCalled)
 	require.Len(t, mockBatch.rows, 1)
 	assert.Equal(t, "node-a", mockBatch.rows[0][1])
-	require.Len(t, mockBatch.rows[0], 13)
-	assert.Equal(t, "", mockBatch.rows[0][7])           // user_agent
-	assert.Equal(t, uint64(2048), mockBatch.rows[0][9]) // bytes_sent
-	assert.Equal(t, uint64(0), mockBatch.rows[0][10])   // request_length
-	assert.Equal(t, uint32(0), mockBatch.rows[0][11])   // request_time_ms
+	require.Len(t, mockBatch.rows[0], 14)
+	assert.Equal(t, "", mockBatch.rows[0][7])            // user_agent
+	assert.Equal(t, "", mockBatch.rows[0][8])            // cache_status
+	assert.Equal(t, uint64(2048), mockBatch.rows[0][10]) // bytes_sent
+	assert.Equal(t, uint64(0), mockBatch.rows[0][11])    // request_length
+	assert.Equal(t, uint32(0), mockBatch.rows[0][12])    // request_time_ms
 }

internal/repository/analytics/node_access_log_writer.go

@@ -47,6 +47,7 @@ func BatchInsertNodeAccessLogs(ctx context.Context, logs []analyticsmodel.NodeAc
 			logItem.Host,
 			logItem.Path,
 			strings.TrimSpace(logItem.UserAgent),
+			strings.TrimSpace(logItem.CacheStatus),
 			logItem.StatusCode,
 			logItem.BytesSent,
 			logItem.RequestLength,