fix(quic): exclude locally rejected datagrams [CI]

backend/shared/MoShiro.Measurement/Core/RowStore.cs

@@ -138,6 +138,36 @@ public sealed class RowStore
         }
     }
 
+    /// <summary>Remove a row that was reserved locally but never accepted by the transport.</summary>
+    internal bool Remove(long key)
+    {
+        lock (_gate)
+        {
+            if (key < 0)
+            {
+                return false;
+            }
+
+            int slot = (int)(key % _capacity);
+            if (_keys[slot] != key)
+            {
+                return false;
+            }
+
+            _keys[slot] = -1;
+            for (int i = 0; i < _columns.Count; i++)
+            {
+                _values[i][slot] = 0;
+                if (_valid[i] is { } valid)
+                {
+                    valid[slot] = false;
+                }
+            }
+
+            return true;
+        }
+    }
+
     /// <summary>读一个值；行不存在或该列没有设置（可空列）返回 false。</summary>
     public bool TryGet(long key, int column, out long value)
     {