test: classify prerequisite lanes and own Avalonia sessions

tests/AcDream.Core.Tests/Input/RetailActionIdentityRoundTripTests.cs

@@ -54,6 +54,7 @@ namespace AcDream.Core.Tests.Input;
 /// here. Reported, not silently resolved either way.</description></item>
 /// </list>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class RetailActionIdentityRoundTripTests
 {
     /// <summary>Actions with a citation-backed, pre-existing reason their DAT-union

tests/AcDream.Core.Tests/Input/RetailActionMapReaderTests.cs

@@ -204,6 +204,7 @@ public sealed class RetailActionMapReaderTests
 /// <summary>Live-DAT conformance: pins the exact shape of the installed
 /// <c>client_portal.dat</c>/<c>client_local_English.dat</c> ActionMap +
 /// MasterInputMap objects. Skips cleanly when the dats are unavailable.</summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class RetailActionMapReader_LiveDatTests
 {
     [Fact]