feat!: probes connect to the backend directly

A probe now links to the backend like an agent (probe.json carries the
server address). The backend sends the agent list as desired state and the
probe reports its platform and build in its own hello. The agent no longer
relays the list or the probe platform. Existing probes must be re-created.

backend/src/Monitor.Backend.Api/Admin/AgentEndpoints.cs

@@ -150,9 +150,9 @@ public static class AgentEndpoints
     private static async Task<IResult> ListProbesAsync(ProbeService probes, CancellationToken ct) =>
         TypedResults.Json(new PageDto<ProbeDto>([.. (await probes.ListAsync(ct)).Select(Mappers.ToDto)], null), ApiJsonContext.Default.PageDtoProbeDto);
 
-    private static async Task<IResult> CreateProbeAsync(HttpContext http, ProbeService probes, CreateProbeRequest? request, CancellationToken ct)
+    private static async Task<IResult> CreateProbeAsync(HttpContext http, ProbeService probes, BackendOptions options, CreateProbeRequest? request, CancellationToken ct)
     {
-        Result<ProbeIdentityFile> result = await probes.CreateAsync(request?.Name, ct);
+        Result<ProbeIdentityFile> result = await probes.CreateAsync(request?.Name, PanelUrl(http, options), ct);
         if (!result.TryGet(out ProbeIdentityFile? file, out FleetError? error))
         {
             return Problems.From(http, error);
@@ -179,9 +179,9 @@ public static class AgentEndpoints
         return result.TryGet(out ProbeView? view, out FleetError? error) ? TypedResults.Json(Mappers.ToDto(view), ApiJsonContext.Default.ProbeDto) : Problems.From(http, error);
     }
 
-    private static async Task<IResult> RotateProbeAsync(HttpContext http, ProbeService probes, string id, CancellationToken ct)
+    private static async Task<IResult> RotateProbeAsync(HttpContext http, ProbeService probes, BackendOptions options, string id, CancellationToken ct)
     {
-        Result<ProbeIdentityFile> result = await probes.RotateAsync(id, ct);
+        Result<ProbeIdentityFile> result = await probes.RotateAsync(id, PanelUrl(http, options), ct);
         if (!result.TryGet(out ProbeIdentityFile? file, out FleetError? error))
         {
             return Problems.From(http, error);
@@ -214,8 +214,9 @@ public static class AgentEndpoints
         return dropped ? TypedResults.NoContent() : Problems.Create(http, MonitorErrors.ProbeOffline, "this probe has no session with this agent");
     }
 
+    /// <summary>Probe 要连的面板地址：配置的公开地址，没有就用这次请求的地址。</summary>
+    private static string PanelUrl(HttpContext http, BackendOptions options) => (options.PublicUrl ?? $"{http.Request.Scheme}://{http.Request.Host}").TrimEnd('/');
+
     private static ProbeIdentityDto ToIdentityDto(ProbeIdentityFile file) =>
-        new(
-            file.ProbeId.Value, file.PrivateKey, [.. file.Bootstrap.Select(b => new BootstrapAgentDto(b.AgentId.Value, b.Host, b.TcpPort, b.Spki))],
-            new ProbeLimitsDto(file.Limits.MaxTestMbps, file.Limits.MaxTotalPps));
+        new(file.ProbeId.Value, file.PrivateKey, file.Server, new ProbeLimitsDto(file.Limits.MaxTestMbps, file.Limits.MaxTotalPps));
 }