first commit

backend/F9WebAiTest.Application/Interfaces/SnowflakeID/ISnowflakeIdGenerator.cs

@@ -0,0 +1,7 @@
+namespace F9WebAiTest.Application.Interfaces.SnowflakeID;
+
+/// <summary>雪花 ID 生成器（ID 生成属于应用能力，故接口放在应用层）</summary>
+public interface ISnowflakeIdGenerator
+{
+    long CreateId();
+}