fix(nodes): locate agents behind a proxy and retry missing countries [CI]

backend/src/MoShiro.Backend.Application/Agents/MoShiroFleetHooks.cs

@@ -115,10 +115,15 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
                 await _events.AddAsync(id, "agent_offline", nodeEvent.AtMs, null, ct);
                 break;
             case NodeEventKind.Hello when nodeEvent.Hello is { } hello:
-                await ApplyHelloAsync(id, hello, ct);
+                await ApplyHelloAsync(id, hello, nodeEvent.RemoteIp, ct);
                 break;
             case NodeEventKind.Heartbeat when nodeEvent.Extra is { } extra:
                 await _nodes.SetVersionAsync(id.Value, NodeKinds.Agent, nodeEvent.Node.NodeVersion, ct);
+                if (_nodes.ShouldRetryGeo(id.Value) && await _agents.GetAsync(id, ct) is { } unlocated)
+                {
+                    _nodes.ObserveAgentInBackground(id.Value, GeoHostOf(unlocated, nodeEvent.RemoteIp), null);
+                }
+
                 try
                 {
                     AgentRuntimeState state = _runtime.Get(id);
@@ -145,6 +150,12 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
         }
     }
 
+    /// <summary>查国家和运营商用哪个地址：对外地址优先，其次 IPv6 地址，都没有（NAT 后面、或者没有上报公网地址）才用这条连接的来源地址。</summary>
+    private static string? GeoHostOf(AgentRecord? agent, string? remoteIp) =>
+        !string.IsNullOrEmpty(agent?.PublicHost) ? agent.PublicHost
+        : !string.IsNullOrEmpty(agent?.Ipv6Host) ? agent.Ipv6Host
+        : remoteIp;
+
     /// <summary>Probe 自己连上来了：hello 里带着它的系统、架构和构建信息；上线下线只推给 SSE，不记事件。</summary>
     private async ValueTask OnProbeEventAsync(NodeId id, NodeEvent nodeEvent, CancellationToken ct)
     {
@@ -213,7 +224,7 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
         }
     }
 
-    private async ValueTask ApplyHelloAsync(NodeId id, HelloParams hello, CancellationToken ct)
+    private async ValueTask ApplyHelloAsync(NodeId id, HelloParams hello, string? remoteIp, CancellationToken ct)
     {
         var kinds = new List<string>();
         foreach (string capability in hello.Capabilities)
@@ -278,7 +289,7 @@ public sealed class MoShiroNodeEventSink : INodeEventSink
 
         // 端口、证书指纹或对外地址变了，Probe 需要新的列表
         AgentRecord? after = await _agents.GetAsync(id, ct);
-        _nodes.ObserveAgentInBackground(id.Value, after?.PublicHost, meta.Platform);
+        _nodes.ObserveAgentInBackground(id.Value, GeoHostOf(after, remoteIp), meta.Platform);
         await _releases.OfferToNodeAsync(id, ct);
         await _schedule.SendToNodeAsync(id, ct);
         if (before is not null && after is not null