TA 导入检查不应边扫描边改报告：完整候选才能替换稳定结果

public enum AssetKind { Texture, Material }
public enum CommitResult { Committed, StaleBatch, ScanFailed, EmptyBatch }

public sealed record ImportAsset(
    string Path,
    AssetKind Kind,
    int MaxSize = 0,
    bool HasMipMaps = false,
    string Shader = "",
    int VariantCount = 0);

public sealed record ValidationIssue(string Path, string Rule, string Detail);
public sealed record ValidationReport(
    long BatchId,
    int AssetCount,
    IReadOnlyList<ValidationIssue> Issues);

public sealed class ImportRuleValidator
{
    public IReadOnlyList<ValidationIssue> Validate(IReadOnlyList<ImportAsset> assets)
    {
        var issues = new List<ValidationIssue>();
        foreach (var asset in assets)
        {
            if (asset.Kind == AssetKind.Texture && asset.MaxSize > 2048)
                issues.Add(new(asset.Path, "texture.max-size", $"{asset.MaxSize} > 2048"));

            if (asset.Kind == AssetKind.Texture && !asset.HasMipMaps)
                issues.Add(new(asset.Path, "texture.mipmaps", "disabled"));

            if (asset.Kind == AssetKind.Material &&
                asset.Shader == "Game/Lit" && asset.VariantCount > 32)
                issues.Add(new(asset.Path, "material.variant-budget", $"{asset.VariantCount} > 32"));
        }
        return issues;
    }
}

public sealed class ImportAuditCoordinator(ImportRuleValidator validator)
{
    private long _latestBatchId;
    public ValidationReport? ActiveReport { get; private set; }

    public long BeginBatch() => ++_latestBatchId;

    public CommitResult CompleteBatch(
        long batchId,
        IReadOnlyList<ImportAsset>? assets,
        bool scanSucceeded)
    {
        if (batchId != _latestBatchId)
            return CommitResult.StaleBatch;
        if (!scanSucceeded || assets is null)
            return CommitResult.ScanFailed;
        if (assets.Count == 0)
            return CommitResult.EmptyBatch;

        var candidate = new ValidationReport(
            batchId, assets.Count, validator.Validate(assets));
        ActiveReport = candidate;
        return CommitResult.Committed;
    }
}

dotnet build $PROBE_ROOT/ImportValidationProbe.csproj -c Release --nologo
dotnet run --project $PROBE_ROOT/ImportValidationProbe.csproj -c Release --no-build

clean: batch=1 assets=2 issues=0 result=Committed
violations: batch=2 assets=3 issues=3 rules=texture.max-size,texture.mipmaps,material.variant-budget result=Committed
scan-failed: batch=3 result=ScanFailed active=2
stale: batch=4 latest=5 result=StaleBatch active=2
current: batch=5 assets=3 issues=3 result=Committed active=5
empty: batch=6 result=EmptyBatch active=5
tests: pass=17 fail=0 skip=0 duration_ms=6.31