test: classify prerequisite lanes and own Avalonia sessions

tests/AcDream.Content.Tests/Ap155StaticSpherePopulationMeasurementTests.cs

@@ -23,6 +23,7 @@ namespace AcDream.Content.Tests;
 /// of the 3,605 "sphere-only, no cylinder" Setups the reachability sweep
 /// already counted fall into exactly that trap.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Ap155StaticSpherePopulationMeasurementTests
 {
     [Fact]

tests/AcDream.Content.Tests/CharGen/ChargenAppearanceCatalogColorTests.cs

@@ -22,6 +22,7 @@ namespace AcDream.Content.Tests.CharGen;
 /// <c>ChargenAppearanceCatalogInstalledDatTests</c>): returns green with a
 /// console SKIP note when no installed dat directory is configured.</para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenAppearanceCatalogColorTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Content.Tests/CharGen/ChargenAppearanceCatalogInstalledDatTests.cs

@@ -28,6 +28,7 @@ namespace AcDream.Content.Tests.CharGen;
 /// consistent with the rest of the suite rather than introducing a new
 /// convention.</para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenAppearanceCatalogInstalledDatTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Content.Tests/CharGen/ChargenTableReaderInstalledDatTests.cs

@@ -14,6 +14,7 @@ namespace AcDream.Content.Tests.CharGen;
 /// cleanly (with a console note) when no DAT directory is configured,
 /// matching e.g. <c>PakEquivalenceTests</c> / <c>RetailDatLoaderTests</c>.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenTableReaderInstalledDatTests
 {
     // ACE ACE.Entity.Enum.HeritageGroup — the four heritages CC1's spec

tests/AcDream.Content.Tests/InstalledPreparedCollisionCatalogTests.cs

@@ -4,6 +4,7 @@ using DatReaderWriter.Options;
 
 namespace AcDream.Content.Tests;
 
+[Trait("Lane", "PreparedPackage")]
 public sealed class InstalledPreparedCollisionCatalogTests
 {
     [Fact]

tests/AcDream.Content.Tests/InstalledSetupBspPrimitiveDispatchTests.cs

@@ -33,6 +33,7 @@ namespace AcDream.Content.Tests;
 /// predicate used here.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class InstalledSetupBspPrimitiveDispatchTests
 {
     // EXTERNAL constants. The four bucket controls are the ones already

tests/AcDream.Content.Tests/InstalledSetupCollisionReachabilityTests.cs

@@ -12,6 +12,7 @@ namespace AcDream.Content.Tests;
 /// asserts no such Setup exists, so the deletion cannot remove collision from
 /// any real object.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class InstalledSetupCollisionReachabilityTests
 {
     // Positive controls. These are EXTERNAL constants, measured on 2026-08-06

tests/AcDream.Content.Tests/Issue334NeftetFormationCellMembershipTests.cs

@@ -42,6 +42,7 @@ namespace AcDream.Content.Tests;
 /// columns 0..4 on both axes.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue334NeftetFormationCellMembershipTests
 {
     private const uint NeftetLandblock = 0x87640000u;

tests/AcDream.Content.Tests/PakEquivalenceTests.cs

@@ -20,6 +20,7 @@ namespace AcDream.Content.Tests;
 /// Skips cleanly when the real dats are absent (CI), matching
 /// DatConcurrencyStressTests' convention.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class PakEquivalenceTests {
     // Known-tricky GfxObj ids reused from existing conformance fixtures:
     // 0x010002B4 / 0x010008A8 — #119 "[up-null] upload returned null" dump

tests/AcDream.Content.Tests/SolidColorTextureCacheTests.cs

@@ -17,6 +17,7 @@ namespace AcDream.Content.Tests;
 /// construct (its ctor builds a RetailPhysicsScriptLoader from dats.Portal).
 /// Skips cleanly when dats are absent, matching ContentConformanceDats convention.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class SolidColorTextureCacheTests {
     [Fact]
     public void GetOrCreateSolidColorTexture_SameColor_ReturnsSameSharedArray() {

tests/AcDream.Content.Tests/Spells/RetailSpellMetadataProjectorTests.cs

@@ -73,6 +73,7 @@ public sealed class RetailSpellMetadataProjectorTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Load_EndOfRetailDat_ResolvesEveryLateLearnedSpellMissingFromCsv()
     {
         string? datDir = ResolveDatDir();
@@ -101,6 +102,7 @@ public sealed class RetailSpellMetadataProjectorTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Load_EndOfRetailDat_UsesRetailFormulaTargetsInsteadOfLegacyExportMasks()
     {
         string? datDir = ResolveDatDir();

tests/AcDream.Content.Tests/Vfx/RetailDatLoaderTests.cs

@@ -432,6 +432,7 @@ public sealed class RetailDatLoaderTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledBlockingScripts_ParseThroughRetailShape_WhenDatsAvailable()
     {
         string? datDir = ResolveDatDirectory();