feat(ops): upload node logs and task traffic [CI]

backend/agent/src/MoShiro.Agent/Chunks/ChunkAssembler.cs

@@ -18,6 +18,7 @@ public sealed class ChunkAssembler
     private readonly NodeId _agent;
     private readonly TimeProvider _time;
     private readonly INodeLog _log;
+    private readonly TaskTrafficReporter _traffic;
 
     public ChunkAssembler(StreamRegistry streams, MonoClock clock, AgentCounters counters, Outbox outbox, NodeId agent, TimeProvider time, INodeLog log)
     {
@@ -28,6 +29,7 @@ public sealed class ChunkAssembler
         _agent = agent;
         _time = time;
         _log = log;
+        _traffic = new TaskTrafficReporter(log, time);
     }
 
     /// <summary>
@@ -68,9 +70,20 @@ public sealed class ChunkAssembler
         return true;
     }
 
+    public Task RunTrafficReportingAsync(CancellationToken ct) => _traffic.RunAsync(ct);
+
+    public void FlushTraffic() => _traffic.Flush();
+
     /// <summary>Agent 自己采集的块（目标任务）直接发出。</summary>
     public void Emit(RawChunk chunk)
     {
-        _outbox.Enqueue(MoShiroChannels.RawChunk, chunk.Header.ChunkId.Value, RawChunkCodec.Encode(chunk));
+        byte[] payload = RawChunkCodec.Encode(chunk, out int uncompressedBytes);
+        _outbox.Enqueue(MoShiroChannels.RawChunk, chunk.Header.ChunkId.Value, payload);
+        _traffic.Record(
+            chunk.Header.TaskId?.Value ?? chunk.Header.TestId?.Value ?? "unknown",
+            chunk.Header.Kind,
+            chunk.Streams.Sum(stream => (long)stream.Count),
+            uncompressedBytes,
+            payload.Length);
     }
 }