Auto: ablegacy-9 — per-device timeout / retry overrides

Closes #252

src/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy/AbLegacyDriverFactoryExtensions.cs

@@ -38,7 +38,10 @@ public static class AbLegacyDriverFactoryExtensions
                         $"AB Legacy config for '{driverInstanceId}' has a device missing HostAddress"),
                     PlcFamily: ParseEnum<AbLegacyPlcFamily>(d.PlcFamily, driverInstanceId, "PlcFamily",
                         fallback: AbLegacyPlcFamily.Slc500),
-                    DeviceName: d.DeviceName))]
+                    DeviceName: d.DeviceName,
+                    // PR 9 — per-device timeout / retry overrides. Device-level wins over driver-wide.
+                    Timeout: d.TimeoutMs is int devMs ? TimeSpan.FromMilliseconds(devMs) : null,
+                    Retries: d.Retries))]
                 : [],
             Tags = dto.Tags is { Count: > 0 }
                 ? [.. dto.Tags.Select(t => new AbLegacyTagDefinition(
@@ -64,6 +67,9 @@ public static class AbLegacyDriverFactoryExtensions
                 ProbeAddress = dto.Probe?.ProbeAddress ?? "S:0",
             },
             Timeout = TimeSpan.FromMilliseconds(dto.TimeoutMs ?? 2_000),
+            // PR 9 — driver-wide retry default. null ≡ 0 retries (single attempt). Per-device
+            // Retries on AbLegacyDeviceOptions still wins.
+            Retries = dto.Retries,
         };
 
         return new AbLegacyDriver(options, driverInstanceId);
@@ -95,6 +101,12 @@ public static class AbLegacyDriverFactoryExtensions
     internal sealed class AbLegacyDriverConfigDto
     {
         public int? TimeoutMs { get; init; }
+        /// <summary>
+        ///     PR 9 — driver-wide retry count for transient <c>BadCommunicationError</c> reads.
+        ///     <c>null</c> ≡ <c>0</c> (single attempt). A per-device override on
+        ///     <see cref="AbLegacyDeviceDto.Retries"/> wins.
+        /// </summary>
+        public int? Retries { get; init; }
         public List<AbLegacyDeviceDto>? Devices { get; init; }
         public List<AbLegacyTagDto>? Tags { get; init; }
         public AbLegacyProbeDto? Probe { get; init; }
@@ -105,6 +117,20 @@ public static class AbLegacyDriverFactoryExtensions
         public string? HostAddress { get; init; }
         public string? PlcFamily { get; init; }
         public string? DeviceName { get; init; }
+
+        /// <summary>
+        ///     PR 9 — optional per-device timeout in ms. Wins over the driver-wide
+        ///     <see cref="AbLegacyDriverConfigDto.TimeoutMs"/>. Tune this per chassis: SLC 5/01
+        ///     RS-232 ≈ 5000, SLC 5/05 ≈ 2000, MicroLogix 1100 ≈ 3000.
+        /// </summary>
+        public int? TimeoutMs { get; init; }
+
+        /// <summary>
+        ///     PR 9 — optional per-device retry count for transient <c>BadCommunicationError</c>
+        ///     reads. Wins over the driver-wide <see cref="AbLegacyDriverConfigDto.Retries"/>.
+        ///     <c>null</c> at both levels = single attempt.
+        /// </summary>
+        public int? Retries { get; init; }
     }
 
     internal sealed class AbLegacyTagDto