agent: keep adaptive rate changes apart from the logs and report them in the heartbeat

backend/agent/src/MoShiro.Agent/AgentApp.cs

@@ -45,6 +45,7 @@ public sealed class AgentApp : IDisposable, IAsyncDisposable
     private readonly PeerListener _peers;
     private readonly PeerHub _hub;
     private readonly ChunkAssembler _chunks;
+    private readonly RateChangeLog _rateChanges = new();
     private readonly TaskManager _tasks;
     private readonly TestRunner _tests;
     private readonly FleetLink _link;
@@ -83,7 +84,7 @@ public sealed class AgentApp : IDisposable, IAsyncDisposable
         _datagrams = new QuicDatagramTransport(_sessions, _admission, _clock, _counters.Data, log, bind, config.Listen.QuicPorts, identity.Certificate, quic);
         // 预握手敲门：控制端口和数据端口共用一个关卡（限速和去重一起算）；名册就是期望状态里的 peers
         _trust = TrustAnchor.Load(config.Fleet.IdentityDir, log);
-        _dialer = new DialerHost(new DialEnv(identity.PeerIdentity, identity.NodeId.Value, config.Limits, quic, new DialDirectory(new ConfigStore(dataDirectory), dataDirectory, log, _trust), _clock, time, log), time, log);
+        _dialer = new DialerHost(new DialEnv(identity.PeerIdentity, identity.NodeId.Value, config.Limits, quic, new DialDirectory(new ConfigStore(dataDirectory), dataDirectory, log, _trust), _clock, time, log, _rateChanges), time, log);
         _knock = new KnockGate(identity.PeerIdentity, RosterKeys, time);
         _tcp = new TcpAcceptor(bind, config.Listen.TcpPorts, identity.Certificate, _sessions, _counters.Data, _knock);
 
@@ -101,7 +102,7 @@ public sealed class AgentApp : IDisposable, IAsyncDisposable
             MaxBulkMbps = config.Limits.MaxTotalMbps,
         };
         _chunks = new ChunkAssembler(_streams, _clock, _counters, _outbox, identity.NodeId, time, log);
-        var targets = new TargetRunners(_chunks, identity.NodeId, _clock, time, log);
+        var targets = new TargetRunners(_chunks, identity.NodeId, _clock, time, log, _rateChanges);
         _tasks = new TaskManager(CreateGuard, _streams, env, targets, () => _datagrams.BoundPorts, () => _tcp.BoundPorts, _trust, acceptLineTasks: _listening);
         _hub = new PeerHub(_sessions, _clock, _chunks, _tasks, _uplink, time, log);
         _tests = new TestRunner(_tasks, _sessions, _streams, env, _uplink, config.Limits.MaxConcurrentTests, transport => transport == "quic_datagram" ? _datagrams.BoundPorts : _tcp.BoundPorts, time, log);
@@ -445,6 +446,7 @@ public sealed class AgentApp : IDisposable, IAsyncDisposable
             DroppedRateLimited = _counters.DroppedRateLimited,
             QueueBytes = _outbox.PendingBytes,
             Update = updateStatus,
+            RateChanges = _rateChanges.Take(64),
             LogSummary = logSummary is null ? null : new LogSummaryDto
             {
                 LastId = logSummary.LastId,