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.Transport/Import/BundleUnlockRateLimitedException.cs

@@ -0,0 +1,35 @@
+namespace ZB.MOM.WW.ScadaBridge.Transport.Import;
+
+/// <summary>
+/// Transport-004: thrown by <see cref="BundleImporter.LoadAsync"/> when the caller
+/// has exceeded the configured per-IP-per-hour unlock attempt cap
+/// (<see cref="TransportOptions.MaxUnlockAttemptsPerIpPerHour"/>). The 429-equivalent
+/// signal: the caller must wait for the trailing-hour window to roll forward before
+/// another passphrase attempt is accepted.
+/// </summary>
+public sealed class BundleUnlockRateLimitedException : Exception
+{
+    /// <summary>
+    /// Rate-limit key the limiter rejected the attempt against — the caller IP when
+    /// supplied, or the bundle's content hash as the architectural fallback (the
+    /// importer has no <c>IHttpContext</c> dependency by design).
+    /// </summary>
+    public string ClientKey { get; }
+
+    /// <summary>Per-window cap that was reached.</summary>
+    public int Limit { get; }
+
+    /// <summary>
+    /// Initializes a new <see cref="BundleUnlockRateLimitedException"/>.
+    /// </summary>
+    /// <param name="clientKey">The rate-limit key that exceeded its budget.</param>
+    /// <param name="limit">The configured per-window cap.</param>
+    public BundleUnlockRateLimitedException(string clientKey, int limit)
+        : base(
+            $"Bundle unlock rate limit reached ({limit} attempts per hour). "
+            + "Wait for the trailing-hour window to expire before retrying.")
+    {
+        ClientKey = clientKey ?? throw new ArgumentNullException(nameof(clientKey));
+        Limit = limit;
+    }
+}