refactor: rename ScadaLink → ZB.MOM.WW.ScadaBridge (code + projects + namespaces)

Solution + 23 src projects + 26 test projects renamed; folders, csproj,
namespaces, and ScadaLinkDbContext/ScadaBridgeDbContext class updated.
ActorSystem "scadalink" → "scadabridge", Akka seed-node URLs migrated.
SQL roles/logins, LDAP domains, CLI command name, and CLI config dir
(~/.scadalink → ~/.scadabridge) also renamed.

Build green; 5 Host.Tests fail awaiting SQL login rename in next commit.
Pre-existing StaleTagMonitor timing flakes unchanged.

Rename script committed at tools/rename-to-scadabridge.sh.

src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Instances/InstanceAttributeOverride.cs

@@ -0,0 +1,20 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Entities.Instances;
+
+public class InstanceAttributeOverride
+{
+    /// <summary>Gets or sets the primary key.</summary>
+    public int Id { get; set; }
+    /// <summary>Gets or sets the foreign key of the owning instance.</summary>
+    public int InstanceId { get; set; }
+    /// <summary>Gets or sets the attribute name this override targets.</summary>
+    public string AttributeName { get; set; }
+    /// <summary>Gets or sets the override value, or <c>null</c> to clear a previous override.</summary>
+    public string? OverrideValue { get; set; }
+
+    /// <summary>Initializes a new <see cref="InstanceAttributeOverride"/> for the given attribute name.</summary>
+    /// <param name="attributeName">The name of the attribute to override.</param>
+    public InstanceAttributeOverride(string attributeName)
+    {
+        AttributeName = attributeName ?? throw new ArgumentNullException(nameof(attributeName));
+    }
+}