fix(native-alarms): a 4-column CSV import keeps stored MES overrides on the CLI path too (ScadaBridge#104)

The bulk SetInstanceNativeAlarmSourceOverridesCommand handler always wrote the
entry's IsMesReportableOverride, so a CLI import of a legacy 4-column CSV (no
MesReportable column) reset every imported source's MES override to inherit. The
Central UI avoided it only by looking up the stored flag client-side.

NativeAlarmSourceOverrideEntry gains an additive trailing KeepStoredMesReportable
flag: when set, the server leaves an existing row's MES override untouched (a new
row inherits) and ignores IsMesReportableOverride; unset keeps the old meaning
(null = clear to inherit), so older senders are unaffected. The CLI and the Central
UI now build their entries through one rule (ToOverrideEntry on each row type):
no MesReportable column => KeepStoredMesReportable. CLI README and
Component-CentralUI updated.

Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV

src/ZB.MOM.WW.ScadaBridge.CLI/Commands/InstanceCommands.cs

@@ -721,10 +721,9 @@ public static class InstanceCommands
                 return 1;
             }
 
-            var overrides = parseResult.Rows
-                .Select(r => new NativeAlarmSourceOverrideEntry(
-                    r.SourceName, r.Connection, r.SourceReference, r.Filter, r.MesReportable))
-                .ToList();
+            // A legacy 4-column file leaves the MES flag unspecified, so the server keeps the
+            // stored overrides (ScadaBridge#104) — the same result as the Central UI import.
+            var overrides = parseResult.Rows.Select(r => r.ToOverrideEntry()).ToList();
             return await CommandHelpers.ExecuteCommandAsync(
                 result, urlOption, formatOption, usernameOption, passwordOption,
                 new SetInstanceNativeAlarmSourceOverridesCommand(id, overrides));

src/ZB.MOM.WW.ScadaBridge.CLI/README.md

@@ -648,8 +648,9 @@ Bulk-apply native alarm source overrides for a single instance from a CSV file
 (all-or-nothing — the native-source parity of `instance import-overrides`). The CSV
 header is required: `SourceName,Connection,SourceReference,Filter`, optionally followed by
 `MesReportable` (`true`, `false` or blank = inherit); a blank override field keeps the
-inherited value. Without the `MesReportable` column every imported source's MES override
-is reset to inherit, so include it to preserve or set MES-reportable overrides. Every named source must resolve for the instance and
+inherited value. Without the `MesReportable` column the file does not specify the MES flag and
+each source keeps its stored MES-reportable override (the same as the Central UI import); include
+the column to set or clear it. Every named source must resolve for the instance and
 be unlocked, or the whole batch is rejected before any write.
 
 ```sh

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Deployment/InstanceConfigure.razor

@@ -1885,11 +1885,7 @@
             }
 
             await MutationServices.ExecuteConfigurationAsync(new SetInstanceNativeAlarmSourceOverridesCommand(Id,
-                outcome.Rows.Select(row => new NativeAlarmSourceOverrideEntry(row.SourceName, row.Connection, row.SourceReference, row.Filter,
-                    // A file with the MesReportable column is authoritative; a legacy 4-column file keeps the stored flag.
-                    row.HasMesColumn
-                        ? row.MesReportable
-                        : _existingNativeOverrides.GetValueOrDefault(row.SourceName)?.IsMesReportableOverride)).ToList()));
+                outcome.Rows.Select(row => row.ToOverrideEntry()).ToList()));
             await OnInitializedAsync();
 
             _nasCsvImportSucceeded = true;

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Deployment/InstanceConfigure.razor.cs

@@ -1,4 +1,5 @@
 using ZB.MOM.WW.ScadaBridge.Commons.Entities.Templates;
+using ZB.MOM.WW.ScadaBridge.Commons.Messages.Management;
 using ZB.MOM.WW.ScadaBridge.Commons.Types;
 using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
 
@@ -143,6 +144,15 @@ public partial class InstanceConfigure
     {
         /// <summary>True when all three override fields are blank (row means "inherit everything").</summary>
         public bool IsClear => Connection is null && SourceReference is null && Filter is null;
+
+        /// <summary>
+        /// The bulk-apply entry for this row. A file with the <c>MesReportable</c> column is
+        /// authoritative for the flag; a legacy 4-column file leaves it unspecified, so the server
+        /// keeps the stored value (ScadaBridge#104) — the same entry the CLI import sends.
+        /// </summary>
+        /// <returns>The entry for <c>SetInstanceNativeAlarmSourceOverridesCommand</c>.</returns>
+        public NativeAlarmSourceOverrideEntry ToOverrideEntry() =>
+            new(SourceName, Connection, SourceReference, Filter, MesReportable, KeepStoredMesReportable: !HasMesColumn);
     }
 
     /// <summary>

src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Management/InstanceCommands.cs

@@ -80,12 +80,28 @@ public record ListInstanceNativeAlarmSourceOverridesCommand(int InstanceId);
 /// value). Mirrors <see cref="SetInstanceNativeAlarmSourceOverrideCommand"/>'s fields
 /// for a single source.
 /// </summary>
+/// <remarks>
+/// <see cref="IsMesReportableOverride"/> is written as given — <c>null</c> means "inherit the
+/// binding's flag" and clears a stored override — unless <see cref="KeepStoredMesReportable"/>
+/// is set (ScadaBridge#104). Then the entry does not specify the MES flag at all: the server
+/// keeps the instance's stored <c>IsMesReportableOverride</c> (inherit for a new override row)
+/// and ignores <see cref="IsMesReportableOverride"/>. The CLI and Central UI CSV imports set it
+/// for a legacy 4-column file that has no <c>MesReportable</c> column, so importing such a file
+/// never resets MES overrides. Additive trailing optional: older senders keep the old meaning.
+/// </remarks>
+/// <param name="SourceCanonicalName">The native alarm source's canonical name.</param>
+/// <param name="ConnectionNameOverride">Connection retarget, or null to inherit.</param>
+/// <param name="SourceReferenceOverride">Source-reference retarget, or null to inherit.</param>
+/// <param name="ConditionFilterOverride">Condition-filter retarget, or null to inherit.</param>
+/// <param name="IsMesReportableOverride">MES-reportable override, or null to inherit.</param>
+/// <param name="KeepStoredMesReportable">True when the entry leaves the MES flag unspecified.</param>
 public record NativeAlarmSourceOverrideEntry(
     string SourceCanonicalName,
     string? ConnectionNameOverride,
     string? SourceReferenceOverride,
     string? ConditionFilterOverride,
-    bool? IsMesReportableOverride = null);
+    bool? IsMesReportableOverride = null,
+    bool KeepStoredMesReportable = false);
 
 /// <summary>
 /// Bulk, all-or-nothing apply of per-instance native-alarm-source overrides — the

src/ZB.MOM.WW.ScadaBridge.Commons/Types/NativeAlarmSourceOverrideCsvParser.cs

@@ -17,7 +17,17 @@ namespace ZB.MOM.WW.ScadaBridge.Commons.Types;
 /// </remarks>
 public sealed record NativeAlarmSourceOverrideCsvRow(
     string SourceName, string? Connection, string? SourceReference, string? Filter, int LineNumber,
-    bool? MesReportable = null, bool HasMesColumn = false);
+    bool? MesReportable = null, bool HasMesColumn = false)
+{
+    /// <summary>
+    /// The bulk-apply entry for this row. Without the <c>MesReportable</c> column the entry
+    /// leaves the MES flag unspecified, so the server keeps each source's stored override
+    /// instead of resetting it to inherit (ScadaBridge#104).
+    /// </summary>
+    /// <returns>The entry for <c>SetInstanceNativeAlarmSourceOverridesCommand</c>.</returns>
+    public ZB.MOM.WW.ScadaBridge.Commons.Messages.Management.NativeAlarmSourceOverrideEntry ToOverrideEntry() =>
+        new(SourceName, Connection, SourceReference, Filter, MesReportable, KeepStoredMesReportable: !HasMesColumn);
+}
 
 /// <summary>
 /// Outcome of parsing a native-alarm-source-override CSV: the successfully-parsed

src/ZB.MOM.WW.ScadaBridge.ManagementService/ManagementActor.cs

@@ -1371,7 +1371,9 @@ public class ManagementActor : ReceiveActor
                     ConnectionNameOverride = entry.ConnectionNameOverride,
                     SourceReferenceOverride = entry.SourceReferenceOverride,
                     ConditionFilterOverride = entry.ConditionFilterOverride,
-                    IsMesReportableOverride = entry.IsMesReportableOverride
+                    // ScadaBridge#104: an entry that leaves the MES flag unspecified keeps the
+                    // stored value — for a new row that is "inherit".
+                    IsMesReportableOverride = entry.KeepStoredMesReportable ? null : entry.IsMesReportableOverride
                 };
                 await repo.AddInstanceNativeAlarmSourceOverrideAsync(ovr);
                 results.Add(ovr);
@@ -1381,7 +1383,8 @@ public class ManagementActor : ReceiveActor
                 existing.ConnectionNameOverride = entry.ConnectionNameOverride;
                 existing.SourceReferenceOverride = entry.SourceReferenceOverride;
                 existing.ConditionFilterOverride = entry.ConditionFilterOverride;
-                existing.IsMesReportableOverride = entry.IsMesReportableOverride;
+                if (!entry.KeepStoredMesReportable)
+                    existing.IsMesReportableOverride = entry.IsMesReportableOverride;
                 await repo.UpdateInstanceNativeAlarmSourceOverrideAsync(existing);
                 results.Add(existing);
             }