docs: complete XML doc comments via fixdocs (2757 to 131 findings)

Add missing <returns>/<param>/<summary>/<typeparam> tags and clean up
misused inheritdoc across 481 files so the documented API surface is
complete. Documentation-only (zero code lines changed). The 131 remaining
findings are inheritdoc-style warnings deliberately left to preserve
hand-written implementation rationale (plan-decision notes, race-condition
explanations).

tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorReconcileTests.cs

@@ -175,10 +175,7 @@ public sealed class DriverHostActorReconcileTests : RuntimeActorTestBase
         /// <param name="supportedType">The driver type this factory supports.</param>
         public CountingDriverFactory(string supportedType) { _supportedType = supportedType; }
 
-        /// <summary>Attempts to create a driver if the type is supported.</summary>
-        /// <param name="driverType">The driver type to create.</param>
-        /// <param name="driverInstanceId">The unique identifier for the driver instance.</param>
-        /// <param name="driverConfigJson">The driver configuration in JSON format.</param>
+        /// <inheritdoc />
         public IDriver? TryCreate(string driverType, string driverInstanceId, string driverConfigJson)
         {
             if (!string.Equals(driverType, _supportedType, StringComparison.Ordinal)) return null;