feat: add InboundEndpoint/UpstreamEndpoint fields to non-OpenAI usage records

Extend RecordUsageInput and RecordUsageLongContextInput structs with InboundEndpoint and UpstreamEndpoint so that Claude, Gemini, and Sora handlers can record endpoint info alongside OpenAI handlers.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode

)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

backend/internal/service/gateway_service.go

@@ -7130,6 +7130,8 @@ type RecordUsageInput struct {
 	User               *User
 	Account            *Account
 	Subscription       *UserSubscription  // 可选：订阅信息
+	InboundEndpoint    string             // 入站端点（客户端请求路径）
+	UpstreamEndpoint   string             // 上游端点（标准化后的上游路径）
 	UserAgent          string             // 请求的 User-Agent
 	IPAddress          string             // 请求的客户端 IP 地址
 	RequestPayloadHash string             // 请求体语义哈希，用于降低 request_id 误复用时的静默误去重风险
@@ -7528,6 +7530,8 @@ func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInpu
 		RequestID:             requestID,
 		Model:                 result.Model,
 		ReasoningEffort:       result.ReasoningEffort,
+		InboundEndpoint:       optionalTrimmedStringPtr(input.InboundEndpoint),
+		UpstreamEndpoint:      optionalTrimmedStringPtr(input.UpstreamEndpoint),
 		InputTokens:           result.Usage.InputTokens,
 		OutputTokens:          result.Usage.OutputTokens,
 		CacheCreationTokens:   result.Usage.CacheCreationInputTokens,
@@ -7608,6 +7612,8 @@ type RecordUsageLongContextInput struct {
 	User                  *User
 	Account               *Account
 	Subscription          *UserSubscription  // 可选：订阅信息
+	InboundEndpoint       string             // 入站端点（客户端请求路径）
+	UpstreamEndpoint      string             // 上游端点（标准化后的上游路径）
 	UserAgent             string             // 请求的 User-Agent
 	IPAddress             string             // 请求的客户端 IP 地址
 	RequestPayloadHash    string             // 请求体语义哈希，用于降低 request_id 误复用时的静默误去重风险
@@ -7705,6 +7711,8 @@ func (s *GatewayService) RecordUsageWithLongContext(ctx context.Context, input *
 		RequestID:             requestID,
 		Model:                 result.Model,
 		ReasoningEffort:       result.ReasoningEffort,
+		InboundEndpoint:       optionalTrimmedStringPtr(input.InboundEndpoint),
+		UpstreamEndpoint:      optionalTrimmedStringPtr(input.UpstreamEndpoint),
 		InputTokens:           result.Usage.InputTokens,
 		OutputTokens:          result.Usage.OutputTokens,
 		CacheCreationTokens:   result.Usage.CacheCreationInputTokens,