添加数据分库;

修复taskManager中异步方法没有正常等待的错误;
删除无用的异常捕获;

ConsoleApp2/Options/TenantDbOptions.cs

@@ -0,0 +1,23 @@
+namespace ConsoleApp2.Options;
+
+public class TenantDbOptions
+{
+    public string TenantKey { get; set; }
+
+    /// <summary>
+    /// Key-Value: {DbName}-{TenantKeyLessThan}
+    /// </summary>
+    public Dictionary<string, int> DbList { get; set; }
+
+    public string GetDbNameByTenantKeyValue(int tenantKeyValue)
+    {
+        // var dictionary = new SortedDictionary<int, string>();
+        // DbList.ForEach(pair => dictionary.Add(pair.Value, pair.Key));
+        // 注意配置顺序
+        var dbName = DbList.Cast<KeyValuePair<string, int>?>()
+            .FirstOrDefault(pair => pair?.Value != null && pair.Value.Value > tenantKeyValue)!.Value.Key;
+        return dbName ??
+               throw new ArgumentOutOfRangeException(nameof(tenantKeyValue),
+                   $"已配置的数据库中没有任何符合'{nameof(tenantKeyValue)}'值的对象");
+    }
+}