Add Policy DSL Validator, Schema Exporter, and Simulation Smoke tools

- Implemented PolicyDslValidator with command-line options for strict mode and JSON output.
- Created PolicySchemaExporter to generate JSON schemas for policy-related models.
- Developed PolicySimulationSmoke tool to validate policy simulations against expected outcomes.
- Added project files and necessary dependencies for each tool.
- Ensured proper error handling and usage instructions across tools.

src/StellaOps.Bench/LinkNotMerge/StellaOps.Bench.LinkNotMerge.Tests/BaselineLoaderTests.cs

@@ -0,0 +1,38 @@
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using StellaOps.Bench.LinkNotMerge.Baseline;
+using Xunit;
+
+namespace StellaOps.Bench.LinkNotMerge.Tests;
+
+public sealed class BaselineLoaderTests
+{
+    [Fact]
+    public async Task LoadAsync_ReadsEntries()
+    {
+        var path = Path.GetTempFileName();
+        try
+        {
+            await File.WriteAllTextAsync(
+                path,
+                "scenario,iterations,observations,aliases,linksets,mean_total_ms,p95_total_ms,max_total_ms,mean_insert_ms,mean_correlation_ms,mean_throughput_per_sec,min_throughput_per_sec,mean_mongo_throughput_per_sec,min_mongo_throughput_per_sec,max_allocated_mb\n" +
+                "lnm_ingest_baseline,5,5000,500,450,320.5,340.1,360.9,120.2,210.3,15000.0,13500.0,18000.0,16500.0,96.5\n");
+
+            var baseline = await BaselineLoader.LoadAsync(path, CancellationToken.None);
+            var entry = Assert.Single(baseline);
+
+            Assert.Equal("lnm_ingest_baseline", entry.Key);
+            Assert.Equal(5, entry.Value.Iterations);
+            Assert.Equal(5000, entry.Value.Observations);
+            Assert.Equal(500, entry.Value.Aliases);
+            Assert.Equal(360.9, entry.Value.MaxTotalMs);
+            Assert.Equal(16500.0, entry.Value.MinMongoThroughputPerSecond);
+            Assert.Equal(96.5, entry.Value.MaxAllocatedMb);
+        }
+        finally
+        {
+            File.Delete(path);
+        }
+    }
+}