fix(deployment): detach each instance's settled rows from the bulk deploy's shared unit of work after Finalize (review 2026-10-21 04/M3)

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

@@ -844,6 +844,27 @@ public class DeploymentManagerRepository : IDeploymentManagerRepository
         return pending.Count;
     }
 
+    /// <inheritdoc />
+    public int DetachSettledDeploymentRows(int instanceId)
+    {
+        // Enumerated into a list first: changing State mutates the tracker.
+        var settled = _dbContext.ChangeTracker.Entries()
+            .Where(e => e.State == EntityState.Unchanged
+                        && e.Entity switch
+                        {
+                            PendingDeployment p => p.InstanceId == instanceId,
+                            DeployedConfigSnapshot s => s.InstanceId == instanceId,
+                            DeploymentRecord r => r.InstanceId == instanceId,
+                            _ => false
+                        })
+            .ToList();
+
+        foreach (var entry in settled)
+            entry.State = EntityState.Detached;
+
+        return settled.Count;
+    }
+
     /// <summary>
     /// Flat shape of the deployment-record ⋈ instance join used to compose the list
     /// query. A named type rather than an anonymous one so