feat(security): add distributed authorization foundation

Tiku.Api/Controllers/TenantsController.cs

@@ -17,6 +17,8 @@ public sealed class TenantsController(
     TikuDbContext dbContext) : ControllerBase
 {
     [HttpGet("current")]
+    [EndpointSummary("查询当前租户")]
+    [EndpointDescription("返回当前请求租户及当前用户在该租户内的成员角色。")]
     public async Task<ActionResult<CurrentTenantResponse>> GetCurrent(CancellationToken cancellationToken)
     {
         if (currentUser.UserId is null || currentTenant.TenantId is null)