consolidate the tests locations

src/__Tests/__Libraries/StellaOps.Concelier.Testing/ConcelierPostgresFixture.cs

@@ -0,0 +1,19 @@
+using System.Reflection;
+using StellaOps.Concelier.Storage.Postgres;
+using StellaOps.Infrastructure.Postgres.Testing;
+using Xunit;
+
+namespace StellaOps.Concelier.Testing;
+
+/// <summary>
+/// PostgreSQL integration test fixture for the Concelier module.
+/// Runs migrations from embedded resources and provides test isolation via schema truncation.
+/// </summary>
+public sealed class ConcelierPostgresFixture : PostgresIntegrationFixture, ICollectionFixture<ConcelierPostgresFixture>
+{
+    protected override Assembly? GetMigrationAssembly()
+        => typeof(ConcelierDataSource).Assembly;
+
+    protected override string GetModuleName() => "Concelier";
+}
+