fix(ablegacy): encode array writes at the data file's element width

Review r0 I3. The array encoder used the AUTHORED dataType's width while both
runtimes size their buffer from the FILE: an Int array on F8 wrote four shorts
into a 16-byte float buffer and sent it all (garbage neighbours, answered
Good); Long/Float on N overran it.

- The write path resolves the element width from the data file the address
  names (N/B/A/I/O/S 16-bit word, L 32-bit, F float) and encodes at THAT width.
- An authored type that does not match its file is refused BadTypeMismatch
  before any runtime exists (warned once, no health write).
- The same rule (AbLegacyTagDefinitionFactory.ArrayFileMismatch) backs an
  Inspect deploy warning and the AdminUI model's Validate error; FromTagConfig
  still accepts the tag so persisted configs keep loading.
- M6: the skipped F1 parity test gains the shapes the write path refuses
  (/bit, .sub, indirect, type/file mismatch, PLC-5 native).

Tests: one case per file type, a mismatch per pairing with nothing created,
and a positive control.

Refs #738
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT

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

@@ -92,6 +92,11 @@ public sealed class AbLegacyTagConfigModel
         if (isArray && arrayLength >= 1 && !AbLegacyTagDefinitionFactory.IsArrayElementTypeSupported(DataType))
             return AbLegacyTagDefinitionFactory.ArrayElementTypeError(DataType);
 
+        // An array must match its data file's element width (review 07 r0 I3): the driver refuses to write a
+        // mismatched one, and reads it at the wrong width.
+        if (isArray && arrayLength >= 1 && AbLegacyTagDefinitionFactory.ArrayFileMismatch(DataType, Address.Trim()) is { } widthError)
+            return widthError;
+
         // Parse-gate backstop: the checks above mirror the reader's whole rejection surface today, so this is
         // expected to be silent for AbLegacy. It is here so a future reader rule cannot become a gap.
         return TagConfigParseGate.Describe(