feat: one-line install for agents and probes from one shared script (curl | bash, zsh, PowerShell) [CI]

backend/src/MoShiro.Backend.Application/Ports/StorePorts.cs

@@ -58,6 +58,9 @@ public interface IJoinTokenStore
 
     ValueTask<IReadOnlyList<JoinTokenInfo>> ListAsync(CancellationToken ct);
 
+    /// <summary>按令牌的 SHA-256 查找（安装脚本用它确认令牌能不能用，不消耗）。</summary>
+    ValueTask<JoinTokenInfo?> FindAsync(byte[] tokenSha256, CancellationToken ct);
+
     ValueTask<bool> RevokeAsync(string id, long nowMs, CancellationToken ct);
 
     ValueTask<bool> DeleteAsync(string id, CancellationToken ct);