Add recovery preflight and ACC restart runbook

tests/BizTalkPlatformManagementTool.Tests/Program.cs

@@ -24,6 +24,7 @@ namespace BizTalkPlatformManagementTool.Tests
             Run("JsonRoundTripIsBomTolerantAndAtomic", JsonRoundTripIsBomTolerantAndAtomic);
             Run("DiffUsesApplicationAndNameIdentity", DiffUsesApplicationAndNameIdentity);
             Run("RestoreRejectsDifferentServer", RestoreRejectsDifferentServer);
+            Run("Legacy213SnapshotIsAcceptedForRecovery", Legacy213SnapshotIsAcceptedForRecovery);
             Run("RestorePlanUsesSafeOrder", RestorePlanUsesSafeOrder);
             Run("ShutdownPlanUsesGlobalSafeOrder", ShutdownPlanUsesGlobalSafeOrder);
             Run("EmergencyRestorePlanStartsSsoFirst", EmergencyRestorePlanStartsSsoFirst);
@@ -98,6 +99,25 @@ namespace BizTalkPlatformManagementTool.Tests
             Expect<InvalidOperationException>(() => SnapshotValidator.EnsureServerMatches(snapshot, "BIZTALK-B"));
         }
 
+        /// <summary>Prüft, dass ein erhaltener 2.1.3-Snapshot ohne Versionssperre als Recovery-Quelle dient.</summary>
+        private static void Legacy213SnapshotIsAcceptedForRecovery()
+        {
+            InTemp(directory =>
+            {
+                var original = Snapshot("APP", "PORT", ArtifactStates.SendPortStarted);
+                original.ToolVersion = "2.1.3-net461";
+                original.Server = "BIZTALK-A.example.local";
+                var path = Path.Combine(directory, "before.json");
+                JsonFileStore.Save(path, original);
+
+                var loaded = JsonFileStore.Load<BizTalkSnapshot>(path);
+                SnapshotValidator.EnsureServerMatches(loaded, "BIZTALK-A");
+                var plan = new BizTalkOperationService(null).CreateEmergencyRestorePlan(loaded, "BIZTALK-A");
+                Assert(plan.Steps.First().Kind == "WindowsService", "legacy snapshot did not create an emergency plan");
+                Assert(loaded.ToolVersion == "2.1.3-net461", "legacy tool version was not preserved");
+            });
+        }
+
         /// <summary>Prüft die sichere Restore-Reihenfolge und den Schutz gebundener Orchestrierungen.</summary>
         private static void RestorePlanUsesSafeOrder()
         {