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/Components/Shared/Drivers/Forms/S7DriverForm.razor

@@ -30,6 +30,32 @@
                 <div class="form-text">Controls ISO-TSAP slot byte during handshake.</div>
             </div>
         </div>
+        <div class="row">
+            <div class="col-md-4 mb-3">
+                <label class="form-label" for="s7ConnType">Connection type</label>
+                <InputSelect id="s7ConnType" @bind-Value="_form.ConnectionTypeText" @bind-Value:after="EmitAsync"
+                             class="form-select form-select-sm">
+                    <option value="">Default (slot-derived)</option>
+                    @foreach (var v in Enum.GetValues<S7ConnectionType>())
+                    {
+                        <option value="@v">@v</option>
+                    }
+                </InputSelect>
+                <div class="form-text">First byte of the remote TSAP. Leave on default unless the CPU needs a PG/OP resource.</div>
+            </div>
+            <div class="col-md-4 mb-3">
+                <label class="form-label" for="s7LocalTsap">Local TSAP</label>
+                <InputText id="s7LocalTsap" @bind-Value="_form.LocalTsap" @bind-Value:after="EmitAsync"
+                           class="form-control form-control-sm mono" placeholder="01.00" />
+                <div class="form-text">Optional hex override, e.g. <code>01.00</code>.</div>
+            </div>
+            <div class="col-md-4 mb-3">
+                <label class="form-label" for="s7RemoteTsap">Remote TSAP</label>
+                <InputText id="s7RemoteTsap" @bind-Value="_form.RemoteTsap" @bind-Value:after="EmitAsync"
+                           class="form-control form-control-sm mono" placeholder="03.01" />
+                <div class="form-text">Optional hex override, e.g. <code>03.01</code>. Not combinable with Connection type.</div>
+            </div>
+        </div>
     </div>
 </section>
 
@@ -141,6 +167,10 @@
         public S7CpuType CpuType { get; set; } = S7CpuType.S71500;
         public short Rack { get; set; } = 0;
         public short Slot { get; set; } = 0;
+        public string? LocalTsap { get; set; }
+        public string? RemoteTsap { get; set; }
+        // Bound to a <select> as text ("" = default) so the nullable enum round-trips through InputSelect.
+        public string ConnectionTypeText { get; set; } = "";
         public int TimeoutSeconds { get; set; } = 5;
 
         // Probe
@@ -160,6 +190,9 @@
             CpuType = o.CpuType,
             Rack = o.Rack,
             Slot = o.Slot,
+            LocalTsap = o.LocalTsap,
+            RemoteTsap = o.RemoteTsap,
+            ConnectionTypeText = o.ConnectionType?.ToString() ?? "",
             TimeoutSeconds = (int)o.Timeout.TotalSeconds,
             ProbeEnabled = o.Probe.Enabled,
             ProbeIntervalSeconds = (int)o.Probe.Interval.TotalSeconds,
@@ -174,6 +207,9 @@
             CpuType = CpuType,
             Rack = Rack,
             Slot = Slot,
+            LocalTsap = string.IsNullOrWhiteSpace(LocalTsap) ? null : LocalTsap.Trim(),
+            RemoteTsap = string.IsNullOrWhiteSpace(RemoteTsap) ? null : RemoteTsap.Trim(),
+            ConnectionType = Enum.TryParse<S7ConnectionType>(ConnectionTypeText, out var ct) ? ct : null,
             Timeout = TimeSpan.FromSeconds(TimeoutSeconds),
             Probe = new S7ProbeOptions
             {

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.";