feat(tls-fingerprint): 新增 TLS 指纹 Profile 数据库管理及代码质量优化

新增功能：
- 新增 TLS 指纹 Profile CRUD 管理（Ent schema + 迁移 + Admin API + 前端管理界面）
- 支持账号绑定数据库中的自定义 TLS Profile，或随机选择（profile_id=-1）
- HTTPUpstream.DoWithTLS 接口从 bool 改为 *tlsfingerprint.Profile，支持按账号指定 Profile
- AccountUsageService 注入 TLSFingerprintProfileService，统一 usage 场景与网关的 Profile 解析逻辑

代码优化：
- 删除已被 TLSFingerprintProfileService 完全取代的 registry.go 死代码（418 行）
- 提取 3 个 dialer 的重复 TLS 握手逻辑为 performTLSHandshake() 共用函数
- 修复 GetTLSFingerprintProfileID 缺少 json.Number 处理的 bug
- gateway_service.Forward 中 ResolveTLSProfile 从重试循环内重复调用改为预解析局部变量
- 删除冗余的 buildClientHelloSpec() 单行 wrapper 和 int64(e.ID) 无效转换
- tls_fingerprint_profile_cache.go 日志从 log.Printf 改为 slog 结构化日志
- dialer_capture_test.go 添加 //go:build integration 标签，防止 CI 失败
- 去重 TestProfileExpectation 类型至共享 test_types_test.go
- 修复 9 个测试文件缺少 tlsfingerprint import 的编译错误
- 修复 error_policy_integration_test.go 中 handleError 回调签名被错误替换的问题

backend/internal/service/gateway_service.go

@@ -566,6 +566,7 @@ type GatewayService struct {
 	debugModelRouting     atomic.Bool
 	debugClaudeMimic      atomic.Bool
 	debugGatewayBodyFile  atomic.Pointer[os.File] // non-nil when SUB2API_DEBUG_GATEWAY_BODY is set
+	tlsFPProfileService   *TLSFingerprintProfileService
 }
 
 // NewGatewayService creates a new GatewayService
@@ -592,6 +593,7 @@ func NewGatewayService(
 	rpmCache RPMCache,
 	digestStore *DigestSessionStore,
 	settingService *SettingService,
+	tlsFPProfileService *TLSFingerprintProfileService,
 ) *GatewayService {
 	userGroupRateTTL := resolveUserGroupRateCacheTTL(cfg)
 	modelsListTTL := resolveModelsListCacheTTL(cfg)
@@ -623,6 +625,7 @@ func NewGatewayService(
 		modelsListCache:      gocache.New(modelsListTTL, time.Minute),
 		modelsListCacheTTL:   modelsListTTL,
 		responseHeaderFilter: compileResponseHeaderFilter(cfg),
+		tlsFPProfileService:  tlsFPProfileService,
 	}
 	svc.userGroupRateResolver = newUserGroupRateResolver(
 		userGroupRateRepo,
@@ -4133,9 +4136,12 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 		proxyURL = account.Proxy.URL()
 	}
 
+	// 解析 TLS 指纹 profile（同一请求生命周期内不变，避免重试循环中重复解析）
+	tlsProfile := s.tlsFPProfileService.ResolveTLSProfile(account)
+
 	// 调试日志：记录即将转发的账号信息
 	logger.LegacyPrintf("service.gateway", "[Forward] Using account: ID=%d Name=%s Platform=%s Type=%s TLSFingerprint=%v Proxy=%s",
-		account.ID, account.Name, account.Platform, account.Type, account.IsTLSFingerprintEnabled(), proxyURL)
+		account.ID, account.Name, account.Platform, account.Type, tlsProfile, proxyURL)
 	// Pre-filter: strip empty text blocks (including nested in tool_result) to prevent upstream 400.
 	body = StripEmptyTextBlocks(body)
 
@@ -4155,7 +4161,7 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 		}
 
 		// 发送请求
-		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, tlsProfile)
 		if err != nil {
 			if resp != nil && resp.Body != nil {
 				_ = resp.Body.Close()
@@ -4233,7 +4239,7 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 					retryReq, buildErr := s.buildUpstreamRequest(retryCtx, c, account, filteredBody, token, tokenType, reqModel, reqStream, shouldMimicClaudeCode)
 					releaseRetryCtx()
 					if buildErr == nil {
-						retryResp, retryErr := s.httpUpstream.DoWithTLS(retryReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+						retryResp, retryErr := s.httpUpstream.DoWithTLS(retryReq, proxyURL, account.ID, account.Concurrency, tlsProfile)
 						if retryErr == nil {
 							if retryResp.StatusCode < 400 {
 								logger.LegacyPrintf("service.gateway", "Account %d: thinking block retry succeeded (blocks downgraded)", account.ID)
@@ -4268,7 +4274,7 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 									retryReq2, buildErr2 := s.buildUpstreamRequest(retryCtx2, c, account, filteredBody2, token, tokenType, reqModel, reqStream, shouldMimicClaudeCode)
 									releaseRetryCtx2()
 									if buildErr2 == nil {
-										retryResp2, retryErr2 := s.httpUpstream.DoWithTLS(retryReq2, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+										retryResp2, retryErr2 := s.httpUpstream.DoWithTLS(retryReq2, proxyURL, account.ID, account.Concurrency, tlsProfile)
 										if retryErr2 == nil {
 											resp = retryResp2
 											break
@@ -4339,7 +4345,7 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 						budgetRetryReq, buildErr := s.buildUpstreamRequest(budgetRetryCtx, c, account, rectifiedBody, token, tokenType, reqModel, reqStream, shouldMimicClaudeCode)
 						releaseBudgetRetryCtx()
 						if buildErr == nil {
-							budgetRetryResp, retryErr := s.httpUpstream.DoWithTLS(budgetRetryReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+							budgetRetryResp, retryErr := s.httpUpstream.DoWithTLS(budgetRetryReq, proxyURL, account.ID, account.Concurrency, tlsProfile)
 							if retryErr == nil {
 								resp = budgetRetryResp
 								break
@@ -4645,7 +4651,7 @@ func (s *GatewayService) forwardAnthropicAPIKeyPassthroughWithInput(
 			return nil, err
 		}
 
-		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 		if err != nil {
 			if resp != nil && resp.Body != nil {
 				_ = resp.Body.Close()
@@ -5364,7 +5370,7 @@ func (s *GatewayService) executeBedrockUpstream(
 			return nil, err
 		}
 
-		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, false)
+		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, nil)
 		if err != nil {
 			if resp != nil && resp.Body != nil {
 				_ = resp.Body.Close()
@@ -8044,7 +8050,7 @@ func (s *GatewayService) ForwardCountTokens(ctx context.Context, c *gin.Context,
 	}
 
 	// 发送请求
-	resp, err := s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+	resp, err := s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 	if err != nil {
 		setOpsUpstreamError(c, 0, sanitizeUpstreamErrorMessage(err.Error()), "")
 		s.countTokensError(c, http.StatusBadGateway, "upstream_error", "Request failed")
@@ -8072,7 +8078,7 @@ func (s *GatewayService) ForwardCountTokens(ctx context.Context, c *gin.Context,
 		filteredBody := FilterThinkingBlocksForRetry(body)
 		retryReq, buildErr := s.buildCountTokensRequest(ctx, c, account, filteredBody, token, tokenType, reqModel, shouldMimicClaudeCode)
 		if buildErr == nil {
-			retryResp, retryErr := s.httpUpstream.DoWithTLS(retryReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+			retryResp, retryErr := s.httpUpstream.DoWithTLS(retryReq, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 			if retryErr == nil {
 				resp = retryResp
 				respBody, err = readUpstreamResponseBodyLimited(resp.Body, maxReadBytes)
@@ -8161,7 +8167,7 @@ func (s *GatewayService) forwardCountTokensAnthropicAPIKeyPassthrough(ctx contex
 		proxyURL = account.Proxy.URL()
 	}
 
-	resp, err := s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+	resp, err := s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 	if err != nil {
 		setOpsUpstreamError(c, 0, sanitizeUpstreamErrorMessage(err.Error()), "")
 		appendOpsUpstreamError(c, OpsUpstreamErrorEvent{