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

Closes #252

scripts/smoke/seed-ablegacy-smoke.sql

@@ -80,15 +80,23 @@ VALUES (@Gen, @EqId, @EqUuid, @DrvId, @LineId, 'slc-sim', 'ablegacy-001', 1);
 
 -- AB Legacy DriverInstance — SLC 500 target. Replace the placeholder gateway
 -- `192.168.1.10` with the real PLC / RSEmulate host before running.
+--
+-- PR 9 / #252 demo: the device row carries `"TimeoutMs": 500` + `"Retries": 1`,
+-- both overriding the driver-wide `TimeoutMs: 2000` / `Retries: 0` defaults.
+-- For real chassis tune per family (SLC 5/01 ≈ 5000, SLC 5/05 ≈ 2000,
+-- MicroLogix 1100 ≈ 3000); see docs/Driver.AbLegacy.Cli.md for the cheat sheet.
 INSERT dbo.DriverInstance(GenerationId, DriverInstanceId, ClusterId, NamespaceId,
                           Name, DriverType, DriverConfig, Enabled)
 VALUES (@Gen, @DrvId, @ClusterId, @NsId, 'ablegacy-smoke', 'AbLegacy', N'{
   "TimeoutMs": 2000,
+  "Retries": 0,
   "Devices": [
     {
       "HostAddress": "ab://127.0.0.1:44818/1,0",
       "PlcFamily": "Slc500",
-      "DeviceName": "slc-500"
+      "DeviceName": "slc-500",
+      "TimeoutMs": 500,
+      "Retries": 1
     }
   ],
   "Probe": { "Enabled": true, "IntervalMs": 5000, "TimeoutMs": 2000, "ProbeAddress": "S:0" },