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

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/TagEditors/S7TagConfigModel.cs

@@ -120,7 +120,9 @@ public sealed class S7TagConfigModel
         {
             var dt = DataType;
             if (dt is S7DataType.Int64 or S7DataType.UInt64 or S7DataType.Float64
-                   or S7DataType.String or S7DataType.DateTime)
+                   or S7DataType.String or S7DataType.DateTime or S7DataType.WString or S7DataType.Char
+                   or S7DataType.WChar or S7DataType.Dtl or S7DataType.Date or S7DataType.Tod
+                   or S7DataType.Time or S7DataType.S5Time)
             {
                 return $"S7 does not support {dt} arrays — use Bool (read-only), Byte, Int16, UInt16, Int32, "
                     + "UInt32 or Float32 for an array tag, or a scalar tag.";