Fetch Feishu tenant identity from app credentials

backend/internal/api/api.go

@@ -312,6 +312,7 @@ func (s *Server) RegisterRoutes(r *gin.Engine) {
 		admin.POST("/system/fix", s.systemFix)
 		admin.GET("/system/tls", s.tlsStatus)
 		admin.GET("/system/identity", idp.Status)
+		admin.POST("/system/identity/tenant", idp.QueryTenant)
 		admin.PUT("/system/identity", idp.Configure)
 		admin.POST("/system/identity/gateway", identityprovider.SecureGateway(), s.identityGateway)
 		admin.PUT("/system/tls/domain", s.setTLSDomain)