feat(s7): STRING/WSTRING/CHAR/WCHAR and DTL/DATE/TOD/TIME/S5TIME codecs, TSAP/connection-type override, negotiated PDU surfaced (#632 #288 #289 #294 #295)

New S7DataType members WString/Char/WChar/Dtl/Date/Tod/Time/S5Time mapped onto existing
DriverDataType (String / DateTime / Int32 ms); writes refuse out-of-range with BadOutOfRange.
Optional localTsap/remoteTsap/connectionType through options, factory JSON, probe and AdminUI form.
NegotiatedPduSize snapshotted at connect and exposed via GetDiagnostics (DriverHealth has no bag).

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Uns/S7TagConfigModelTests.cs

@@ -112,6 +112,14 @@ public sealed class S7TagConfigModelTests
     [InlineData("Float64")]
     [InlineData("String")]
     [InlineData("DateTime")]
+    [InlineData("WString")]
+    [InlineData("Char")]
+    [InlineData("WChar")]
+    [InlineData("Dtl")]
+    [InlineData("Date")]
+    [InlineData("Tod")]
+    [InlineData("Time")]
+    [InlineData("S5Time")]
     public void Validate_rejects_wide_type_arrays(string dataType)
     {
         var m = S7TagConfigModel.FromJson(