feat(ssf): 托管机器凭据并支持动态恢复

Gateway 连接表单接收认证中心一次性交付的 machine Client 凭据，后端立即写入 SecretStore，数据库和公开响应只保留引用及公开 Client ID。SSF 管理 Token、Verification 和 RFC 7662 内省统一从动态凭据读取，支持现有连接无重启修复及进程重启恢复，环境变量仅保留为旧部署回退。\n\n验证：go test ./apps/api/...；pnpm nx test web；真实重启、OIDC 登录与 session-revoked 1.29 秒失效验收。

apps/api/internal/auth/oidc.go

@@ -25,19 +25,20 @@ const maxOIDCResponseBytes = 1 << 20
 const defaultOIDCHTTPTimeout = 10 * time.Second
 
 type OIDCConfig struct {
-	Issuer                     string
-	Audience                   string
-	TenantID                   string
-	RolePrefix                 string
-	RequiredScopes             []string
-	JWKSCacheTTL               time.Duration
-	IntrospectionEnabled       bool
-	IntrospectionClientID      string
-	IntrospectionClientSecret  string
-	HTTPClient                 *http.Client
-	SecurityEventEvaluator     func(context.Context, OIDCSecurityEventIdentity) (OIDCSecurityEventEvaluation, error)
-	IntrospectionObserver      func(string)
-	JWKSRefreshFailureObserver func()
+	Issuer                          string
+	Audience                        string
+	TenantID                        string
+	RolePrefix                      string
+	RequiredScopes                  []string
+	JWKSCacheTTL                    time.Duration
+	IntrospectionEnabled            bool
+	IntrospectionClientID           string
+	IntrospectionClientSecret       string
+	IntrospectionCredentialProvider func(context.Context) (string, []byte, error)
+	HTTPClient                      *http.Client
+	SecurityEventEvaluator          func(context.Context, OIDCSecurityEventIdentity) (OIDCSecurityEventEvaluation, error)
+	IntrospectionObserver           func(string)
+	JWKSRefreshFailureObserver      func()
 }
 
 type OIDCSecurityEventIdentity struct {
@@ -92,7 +93,8 @@ func NewOIDCVerifier(config OIDCConfig) (*OIDCVerifier, error) {
 	if err := validatePublicURL(config.Issuer); err != nil || config.Audience == "" || config.TenantID == "" || config.RolePrefix == "" {
 		return nil, errors.New("issuer, audience, tenant and role prefix are required")
 	}
-	if config.IntrospectionEnabled && (strings.TrimSpace(config.IntrospectionClientID) == "" || config.IntrospectionClientSecret == "") {
+	if config.IntrospectionEnabled && config.IntrospectionCredentialProvider == nil &&
+		(strings.TrimSpace(config.IntrospectionClientID) == "" || config.IntrospectionClientSecret == "") {
 		return nil, errors.New("introspection client credentials are required when introspection is enabled")
 	}
 	if config.JWKSCacheTTL <= 0 {
@@ -295,7 +297,19 @@ func (v *OIDCVerifier) introspect(ctx context.Context, raw string) (bool, error)
 	}
 	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 	request.Header.Set("Accept", "application/json")
-	request.SetBasicAuth(v.config.IntrospectionClientID, v.config.IntrospectionClientSecret)
+	clientID := v.config.IntrospectionClientID
+	secret := []byte(v.config.IntrospectionClientSecret)
+	if v.config.IntrospectionCredentialProvider != nil {
+		clientID, secret, err = v.config.IntrospectionCredentialProvider(ctx)
+		if err != nil {
+			return false, err
+		}
+	}
+	defer clear(secret)
+	if strings.TrimSpace(clientID) == "" || len(secret) < 16 {
+		return false, errors.New("OIDC introspection credential is unavailable")
+	}
+	request.SetBasicAuth(clientID, string(secret))
 	response, err := v.client.Do(request)
 	if err != nil {
 		return false, err

apps/api/internal/auth/oidc_test.go

@@ -138,8 +138,10 @@ func TestOIDCVerifierFailsClosedWhenIntrospectionMarksSessionInactive(t *testing
 	verifier, err := NewOIDCVerifier(OIDCConfig{
 		Issuer: issuer, Audience: "gateway-api", TenantID: "tenant-1", RolePrefix: "gateway.",
 		RequiredScopes: []string{"gateway.access"}, HTTPClient: server.Client(),
-		IntrospectionEnabled: true, IntrospectionClientID: "gateway-api",
-		IntrospectionClientSecret: "introspection-secret",
+		IntrospectionEnabled: true,
+		IntrospectionCredentialProvider: func(context.Context) (string, []byte, error) {
+			return "gateway-api", []byte("introspection-secret"), nil
+		},
 	})
 	if err != nil {
 		t.Fatal(err)