chore: initial project import

backend/fleet/src/Fleet.Server.Abstractions/FleetServerOptions.cs

@@ -0,0 +1,15 @@
+namespace Fleet.Server;
+
+public sealed class FleetServerOptions
+{
+    /// <summary>节点 ID 的类型前缀，Monitor 使用 <c>agt</c>。</summary>
+    public string NodeIdPrefix { get; set; } = "node";
+
+    public int MaxFrameBytes { get; set; } = 16 << 20;
+
+    public TimeSpan ChallengeTtl { get; set; } = TimeSpan.FromSeconds(30);
+
+    public TimeSpan HeartbeatTimeout { get; set; } = TimeSpan.FromSeconds(45);
+
+    public TimeSpan RequestTimeout { get; set; } = TimeSpan.FromSeconds(15);
+}