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/Interfaces/Services/INodeIdentityProvider.cs

@@ -0,0 +1,22 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Services;
+
+/// <summary>
+/// Surfaces the local node's semantic role-within-cluster name so downstream
+/// audit writers can stamp it on the SourceNode column.
+/// </summary>
+/// <remarks>
+/// Conventional values follow the pattern <c>node-a</c>/<c>node-b</c> on site
+/// nodes and <c>central-a</c>/<c>central-b</c> on central nodes. The value is
+/// a free-form operator-supplied label — there is no enforced format. When the
+/// configuration value is missing, empty, or whitespace, implementations
+/// return <c>null</c> so audit writers can persist NULL rather than an empty
+/// string.
+/// </remarks>
+public interface INodeIdentityProvider
+{
+    /// <summary>
+    /// The configured semantic node name, trimmed of surrounding whitespace.
+    /// <c>null</c> when unconfigured.
+    /// </summary>
+    string? NodeName { get; }
+}