fix(drivers): serialize driver-config enums as strings in AdminUI pages + probes

AdminUI driver-instance pages serialized enum config fields (S7 CpuType,
Modbus DataType/Region, AbCip PlcFamily, ...) as JSON *numbers* because each
page's _jsonOpts lacked a JsonStringEnumConverter. The driver factories,
however, deserialize into string-typed DTOs (+ lenient ParseEnum) and throw
when binding a JSON number to a string? — so an AdminUI-authored config
containing any enum field produced a blob the driver could not parse,
faulting the driver on deploy. Proven end-to-end for S7 and Modbus; latent
for AbCip/AbLegacy/TwinCAT/FOCAS/Galaxy/Historian. Only OpcUaClient was safe
(its factory + probe already carried the converter).

Add JsonStringEnumConverter to all 9 driver-instance pages' _jsonOpts and the
8 missing driver probes' _opts (factories unchanged — already string-via-
ParseEnum; strictly more permissive, also lets pages load hand-seeded
string-enum configs back into the form).

Also fix DriverProbeHandshakeE2eTests.AbCip_Green_AgainstSim to probe a real
sim tag (TestDINT) — the no-tags @raw_cpu_type fallback is rejected by the
ab_server sim with ErrorBadParam (a real ControlLogix returns ErrorNotFound,
which the probe treats as reachable; hardware-gated follow-up).

Tests: reflection guard over all driver pages' _jsonOpts (AdminUI.Tests);
factory round-trip + numeric-form-throws guards for S7 and Modbus.

Found by running the never-before-run FB-9/FB-10 live verifies.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/AbCipDriverPage.razor

@@ -224,6 +224,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/AbLegacyDriverPage.razor

@@ -190,6 +190,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/FocasDriverPage.razor

@@ -267,6 +267,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/GalaxyDriverPage.razor

@@ -218,6 +218,7 @@ else
         PropertyNameCaseInsensitive = true,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/HistorianWonderwareDriverPage.razor

@@ -166,6 +166,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/ModbusDriverPage.razor

@@ -330,6 +330,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/OpcUaClientDriverPage.razor

@@ -279,6 +279,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/S7DriverPage.razor

@@ -196,6 +196,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/TwinCATDriverPage.razor

@@ -206,6 +206,7 @@ else
         PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase,
         UnmappedMemberHandling = System.Text.Json.Serialization.JsonUnmappedMemberHandling.Skip,
         WriteIndented = false,
+        Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() },
     };
 
     private FormModel _form = new();