feat(otopcua): add ITagDiscovery.RediscoverPolicy + per-driver assignments (follow-up B)

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbCip/AbCipDriver.cs

@@ -998,6 +998,14 @@ public sealed class AbCipDriver : IDriver, IReadable, IWritable, ITagDiscovery,
 
     // ---- ITagDiscovery ----
 
+    /// <summary>
+    ///     Run-once: <see cref="DiscoverAsync"/> emits pre-declared tags and (when
+    ///     EnableControllerBrowse is set) fully awaits the @tags symbol-table walk + UDT-shape
+    ///     resolution within the single call, streaming the complete node set in one pass —
+    ///     nothing fills in asynchronously after connect, so a single discovery pass is sufficient.
+    /// </summary>
+    public DiscoveryRediscoverPolicy RediscoverPolicy => DiscoveryRediscoverPolicy.Once;
+
     /// <summary>
     ///     Stream the driver's tag set into the builder. Pre-declared tags from
     ///     <see cref="AbCipDriverOptions.Tags"/> emit first; optionally, the