Auto: s7-d1 — TIA Portal CSV + STEP 7 Classic AWL symbol import

Closes #299

src/ZB.MOM.WW.OtOpcUa.Driver.S7/SymbolImport/S7ImportResult.cs

@@ -0,0 +1,25 @@
+namespace ZB.MOM.WW.OtOpcUa.Driver.S7.SymbolImport;
+
+/// <summary>
+///     Outcome of a single <see cref="IS7SymbolImporter"/> run. <see cref="Tags"/> carries
+///     the imported tag definitions ready to drop into <c>S7DriverOptions.Tags</c>;
+///     <see cref="ParsedCount"/>, <see cref="SkippedCount"/>, <see cref="ErrorCount"/>, and
+///     <see cref="UdtPlaceholderCount"/> give the operator a single line of telemetry
+///     ("imported 142 / skipped 3 / errored 0 / udt 5") suitable for either a CLI summary
+///     or a startup-time log line.
+/// </summary>
+/// <remarks>
+///     <para>
+///         <see cref="ParsedCount"/> includes UDT placeholders — placeholders count as
+///         imported tags (they materialise as <see cref="S7TagDefinition"/> rows the driver
+///         can list in the Admin UI), they're just non-functional until PR-S7-D2 lands.
+///         <see cref="UdtPlaceholderCount"/> is a sub-count operators can compare against
+///         <see cref="ParsedCount"/> to spot how much of the import is still placeholder.
+///     </para>
+/// </remarks>
+public sealed record S7ImportResult(
+    IReadOnlyList<S7TagDefinition> Tags,
+    int ParsedCount,
+    int SkippedCount,
+    int ErrorCount,
+    int UdtPlaceholderCount);