AI Gateway Go 0.10.0 源码快照 + 旗舰版需求规划报告

M0-M7 已完成:核心网关(身份/RBAC/TOTP/OIDC/SAML/Provider/配额/路由/内容策略/审计/定价)+ 资源市场(MCP/Skills/数字员工)。
含 22 个 PostgreSQL 迁移、管理端/门户端前端源码、OpenAPI 契约、部署 compose。

Co-Authored-By: Claude <noreply@anthropic.com>

internal/apikey/usage.go

@@ -0,0 +1,42 @@
+package apikey
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+)
+
+type UsageStore struct{ redis *redis.Client }
+
+func NewUsageStore(client *redis.Client) *UsageStore { return &UsageStore{redis: client} }
+
+func MonthlyTokenUsageKey(apiKeyID string, now time.Time) string {
+	return fmt.Sprintf("gateway:usage:api-key:%s:tokens:%s", apiKeyID, now.UTC().Format("200601"))
+}
+
+func (s *UsageStore) MonthlyTokens(ctx context.Context, apiKeyIDs []string, now time.Time) (map[string]int64, error) {
+	usage := make(map[string]int64, len(apiKeyIDs))
+	if len(apiKeyIDs) == 0 || s == nil || s.redis == nil {
+		return usage, nil
+	}
+	pipe := s.redis.Pipeline()
+	commands := make(map[string]*redis.StringCmd, len(apiKeyIDs))
+	for _, id := range apiKeyIDs {
+		commands[id] = pipe.Get(ctx, MonthlyTokenUsageKey(id, now))
+	}
+	_, err := pipe.Exec(ctx)
+	if err != nil && err != redis.Nil {
+		return nil, fmt.Errorf("%w: %v", ErrStore, err)
+	}
+	for id, command := range commands {
+		value, commandErr := command.Int64()
+		if commandErr == nil {
+			usage[id] = max(value, 0)
+		} else if commandErr != redis.Nil {
+			return nil, fmt.Errorf("%w: %v", ErrStore, commandErr)
+		}
+	}
+	return usage, nil
+}