fix(tagconfig): a numerically-spelled enum names no member — reject it fleet-wide (Driver.Sql.Contracts-002)

TagConfigJson.ClassifyEnumText classified via Enum.TryParse(text, ignoreCase: true),
which accepts a numeric STRING for any enum: "1" returns the member at that ordinal
and an out-of-range "99" parses just as happily. Every driver contract's strict enum
read inherits that, so a Sql tag authored "type":"99" was ACCEPTED, carried
(DriverDataType)99, and SqlPollReader.TryCoerce fell through its switch to the String
arm — a stringified cell published Good under a type nothing can map.

Refuse a digit- or sign-leading spelling before the parse (judged on the TRIMMED text,
because Enum.TryParse trims), and require Enum.IsDefined — which covers what the
leading-character check cannot, since TryParse also ORs a comma-separated list for a
non-[Flags] enum. Mirrors RawBrowseCommitMapper.ParseNativeType and
MTConnectTagDefinitionFactory.TryParseDataType, which already guard their own parses.

Three AdminUI restatements of the same rule now ask ClassifyEnumText instead of
Enum.TryParse (TagConfigJson.GetEnum, SqlTagConfigModel.ReadEnumStrict,
MqttTagConfigModel.DescribeInvalidEnum/GetEnumNullable) — leaving them would have opened
the #549 direction the moment the runtime tightened: a blob the modal accepts and the
driver skips.

RED first: 10 failing in Core.Abstractions.Tests, 4 in Driver.Sql.Tests, and 10 of the
11 new fleet-wide parity cases (re-confirmed by reverting the Core fix).

src/Core/ZB.MOM.WW.OtOpcUa.Core.Abstractions/TagConfigJson.cs

@@ -8,10 +8,13 @@ public enum JsonEnumRead
     /// <summary>The property is absent, or present but not a JSON string (nothing to validate).</summary>
     Absent,
 
-    /// <summary>The property is a JSON string that parses (case-insensitively) to the enum.</summary>
+    /// <summary>The property is a JSON string naming (case-insensitively) a declared enum member.</summary>
     Valid,
 
-    /// <summary>The property is a JSON string that does NOT parse to the enum (a typo'd value).</summary>
+    /// <summary>
+    ///     The property is a JSON string that names no declared enum member — a typo, or a numeric
+    ///     spelling such as <c>"8"</c>, which is not a name at all.
+    /// </summary>
     Invalid,
 }
 
@@ -67,6 +70,19 @@ public static class TagConfigJson
     ///         treatment of an absent or present-but-non-string property — so a caller that extracts "the
     ///         string value, or null" gets the runtime's leniency for free.
     ///     </para>
+    ///     <para>
+    ///         <b>Only a member NAME is valid — a numeric spelling is refused before the parse.</b>
+    ///         <see cref="Enum.TryParse{TEnum}(string, bool, out TEnum)"/> accepts <c>"1"</c> for any enum
+    ///         and hands back whatever member sits at that ordinal, and an out-of-range <c>"99"</c> parses
+    ///         just as readily — so a TagConfig carrying a numerically-serialised enum (the repo-wide
+    ///         authoring trap) read <see cref="JsonEnumRead.Valid"/> at all six driver parsers and bound a
+    ///         tag to a type nobody named, under <c>Good</c> quality. The same idiom guards
+    ///         <c>RawBrowseCommitMapper.NativeType</c> and <c>MTConnectTagDefinitionFactory</c>'s own type
+    ///         parse. <see cref="Enum.IsDefined{TEnum}(TEnum)"/> then covers what the leading-character
+    ///         check cannot: <c>TryParse</c> also bitwise-ORs a comma-separated list for a
+    ///         non-<c>[Flags]</c> enum, so <c>"Beta, Gamma"</c> would otherwise parse to a value no member
+    ///         declares.
+    ///     </para>
     /// </summary>
     /// <typeparam name="TEnum">The enum type to parse.</typeparam>
     /// <param name="text">The authored value's text, or <see langword="null"/> when there is none.</param>
@@ -80,12 +96,26 @@ public static class TagConfigJson
             value = default;
             return JsonEnumRead.Absent;
         }
-        if (Enum.TryParse(text, ignoreCase: true, out value))
+        if (IsMemberNameSpelling(text) && Enum.TryParse(text, ignoreCase: true, out value) && Enum.IsDefined(value))
             return JsonEnumRead.Valid;
         value = default;
         return JsonEnumRead.Invalid;
     }
 
+    /// <summary>
+    ///     Whether <paramref name="text"/> is spelled as a member name rather than as a number. Judged on
+    ///     the TRIMMED text because <see cref="Enum.TryParse{TEnum}(string, bool, out TEnum)"/> trims
+    ///     before parsing, so <c>" 8 "</c> is the numeric spelling too; a C# member name can never begin
+    ///     with a digit or a sign, so no valid name is lost.
+    /// </summary>
+    /// <param name="text">The authored value's text.</param>
+    /// <returns><see langword="true"/> when the text could be a member name.</returns>
+    private static bool IsMemberNameSpelling(string text)
+    {
+        var span = text.AsSpan().Trim();
+        return span.Length > 0 && !char.IsAsciiDigit(span[0]) && span[0] is not ('-' or '+');
+    }
+
     /// <summary>
     ///     Lenient enum read with today's exact semantics: absent OR invalid ⇒ <paramref name="fallback"/>;
     ///     only a present, parseable string yields the parsed value. Bit-for-bit equivalent to the six

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

@@ -1,6 +1,8 @@
 using System.Text.Json.Nodes;
 using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 using ZB.MOM.WW.OtOpcUa.Driver.Mqtt;
+using RuntimeJsonEnumRead = ZB.MOM.WW.OtOpcUa.Core.Abstractions.JsonEnumRead;
+using RuntimeTagConfigJson = ZB.MOM.WW.OtOpcUa.Core.Abstractions.TagConfigJson;
 
 namespace ZB.MOM.WW.OtOpcUa.AdminUI.Uns.TagEditors;
 
@@ -415,13 +417,20 @@ public sealed class MqttTagConfigModel
     /// <param name="name">The property name to read.</param>
     /// <returns>The parsed enum value, or <c>null</c>.</returns>
     private static TEnum? GetEnumNullable<TEnum>(JsonObject o, string name) where TEnum : struct, Enum
-        => TagConfigJson.GetString(o, name) is { } s && Enum.TryParse<TEnum>(s, ignoreCase: true, out var v) ? v : null;
+        => RuntimeTagConfigJson.ClassifyEnumText<TEnum>(TagConfigJson.GetString(o, name), out var v)
+           == RuntimeJsonEnumRead.Valid
+            ? v
+            : null;
 
     /// <summary>
     ///     Describes a present-but-invalid enum field, or <c>null</c> when it is absent or valid.
     ///     Mirrors <c>TagConfigJson.TryReadEnum</c>'s absent/valid/invalid split exactly — including its
     ///     treatment of a present-but-non-string value as ABSENT — so the editor never blocks a blob the
-    ///     driver would happily default.
+    ///     driver would happily default. The VERDICT is the runtime's own
+    ///     <see cref="RuntimeTagConfigJson.ClassifyEnumText{TEnum}"/>, never a local
+    ///     <see cref="Enum.TryParse{TEnum}(string, bool, out TEnum)"/>: a numeric spelling such as
+    ///     <c>"1"</c> parses there and names no member (Driver.Sql.Contracts-002), so restating the rule
+    ///     here would accept a blob the driver refuses — the Gitea #549 direction.
     /// </summary>
     /// <typeparam name="TEnum">The enum type expected.</typeparam>
     /// <param name="o">The TagConfig key bag.</param>
@@ -433,7 +442,7 @@ public sealed class MqttTagConfigModel
         {
             return null;
         }
-        return Enum.TryParse<TEnum>(raw, ignoreCase: true, out _)
+        return RuntimeTagConfigJson.ClassifyEnumText<TEnum>(raw, out _) == RuntimeJsonEnumRead.Valid
             ? null
             : $"'{raw}' is not a valid {name}; valid: {string.Join(", ", Enum.GetNames<TEnum>())}.";
     }

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

@@ -1,6 +1,7 @@
 using System.Text.Json.Nodes;
 using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 using ZB.MOM.WW.OtOpcUa.Driver.Sql.Contracts;
+using RuntimeTagConfigJson = ZB.MOM.WW.OtOpcUa.Core.Abstractions.TagConfigJson;
 
 namespace ZB.MOM.WW.OtOpcUa.AdminUI.Uns.TagEditors;
 
@@ -156,7 +157,9 @@ public sealed class SqlTagConfigModel
 
     // Reads an enum-valued string field the way the parser's TryReadEnumStrict does: absent OR present-but-
     // non-string ⇒ (null, null) — nothing to validate; a present string that parses ⇒ (value, null); a
-    // present string that does NOT parse ⇒ (null, offendingString) so Validate can reject it.
+    // present string that does NOT parse ⇒ (null, offendingString) so Validate can reject it. The verdict is
+    // the RUNTIME's own ClassifyEnumText, not a local Enum.TryParse — restating it is how the two doors drift
+    // (Gitea #549), and a numeric spelling like "1" is exactly where they would have (Driver.Sql.Contracts-002).
     private static (TEnum? value, string? invalidRaw) ReadEnumStrict<TEnum>(JsonObject o, string name)
         where TEnum : struct, Enum
     {
@@ -164,7 +167,9 @@ public sealed class SqlTagConfigModel
         {
             return (null, null);
         }
-        return Enum.TryParse<TEnum>(s, ignoreCase: true, out var parsed) ? (parsed, null) : (null, s);
+        return RuntimeTagConfigJson.ClassifyEnumText<TEnum>(s, out var parsed) == JsonEnumRead.Valid
+            ? (parsed, null)
+            : (null, s);
     }
 }
 

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

@@ -1,5 +1,6 @@
 using System.Text.Json;
 using System.Text.Json.Nodes;
+using JsonEnumRead = ZB.MOM.WW.OtOpcUa.Core.Abstractions.JsonEnumRead;
 using RuntimeTagConfigJson = ZB.MOM.WW.OtOpcUa.Core.Abstractions.TagConfigJson;
 
 namespace ZB.MOM.WW.OtOpcUa.AdminUI.Uns.TagEditors;
@@ -57,14 +58,23 @@ public static class TagConfigJson
     public static bool? GetBoolNullable(JsonObject o, string name)
         => o.TryGetPropertyValue(name, out var n) && n is JsonValue v && v.TryGetValue<bool>(out var b) ? b : null;
 
-    /// <summary>Reads an enum by its serialised name, or <paramref name="fallback"/> if absent/unparseable.</summary>
+    /// <summary>
+    ///     Reads an enum by its serialised NAME, or <paramref name="fallback"/> if absent/unreadable. The
+    ///     name/number distinction comes from
+    ///     <see cref="RuntimeTagConfigJson.ClassifyEnumText{TEnum}"/> rather than from
+    ///     <see cref="Enum.TryParse{TEnum}(string, bool, out TEnum)"/> directly, so a numerically-spelled
+    ///     value the runtime refuses is not DISPLAYED here as the member sitting at that ordinal — the
+    ///     editor would show, and then save, a type nobody authored.
+    /// </summary>
     /// <typeparam name="TEnum">The enum type to parse.</typeparam>
     /// <param name="o">The JSON object to read from.</param>
     /// <param name="name">The property name to read.</param>
-    /// <param name="fallback">The value to return if the property is absent or unparseable.</param>
+    /// <param name="fallback">The value to return if the property is absent or unreadable.</param>
     /// <returns>The parsed enum value, or <paramref name="fallback"/>.</returns>
     public static TEnum GetEnum<TEnum>(JsonObject o, string name, TEnum fallback) where TEnum : struct, Enum
-        => GetString(o, name) is { } s && Enum.TryParse<TEnum>(s, ignoreCase: true, out var v) ? v : fallback;
+        => RuntimeTagConfigJson.ClassifyEnumText<TEnum>(GetString(o, name), out var v) == JsonEnumRead.Valid
+            ? v
+            : fallback;
 
     /// <summary>
     ///     Describes a present-but-invalid enum field the way the RUNTIME parser judges it, or