fix(reconcile): heal all concurrently-missing nodes — return existing pending token instead of omitting

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/DeploymentManagerRepository.cs

@@ -226,6 +226,19 @@ public class DeploymentManagerRepository : IDeploymentManagerRepository
             .FirstOrDefaultAsync(p => p.DeploymentId == deploymentId, cancellationToken);
     }
 
+    /// <inheritdoc />
+    public Task<PendingDeployment?> GetPendingDeploymentByInstanceIdAsync(int instanceId, CancellationToken cancellationToken = default)
+    {
+        // At most one pending row per instance by design (supersession + stage-if-absent),
+        // but order deterministically and take the most recent so a hypothetical duplicate
+        // never makes the read non-deterministic — mirrors GetCurrentDeploymentStatusAsync.
+        return _dbContext.Set<PendingDeployment>()
+            .Where(p => p.InstanceId == instanceId)
+            .OrderByDescending(p => p.CreatedAtUtc)
+            .ThenByDescending(p => p.Id)
+            .FirstOrDefaultAsync(cancellationToken);
+    }
+
     /// <inheritdoc />
     public async Task DeletePendingDeploymentByIdAsync(string deploymentId, CancellationToken cancellationToken = default)
     {