fix(audit): ScadaBridge C3 review — safe enum-parse (fallback) in SqliteAuditWriter.MapRow + AuditEventDtoMapper.FromDto (Task 2.5)

src/ZB.MOM.WW.ScadaBridge.AuditLog/Site/SqliteAuditWriter.cs

@@ -800,9 +800,9 @@ public class SqliteAuditWriter : IAuditWriter, ISiteAuditQueue, IAsyncDisposable
                 System.Globalization.CultureInfo.InvariantCulture,
                 System.Globalization.DateTimeStyles.RoundtripKind),
             IngestedAtUtc: null,
-            Channel: Enum.Parse<AuditChannel>(reader.GetString(2)),
-            Kind: Enum.Parse<AuditKind>(reader.GetString(3)),
-            Status: Enum.Parse<AuditStatus>(reader.GetString(11)),
+            Channel: AuditRowProjection.ParseEnum<AuditChannel>(reader.GetString(2), AuditChannel.ApiInbound),
+            Kind: AuditRowProjection.ParseEnum<AuditKind>(reader.GetString(3), AuditKind.InboundRequest),
+            Status: AuditRowProjection.ParseEnum<AuditStatus>(reader.GetString(11), AuditStatus.Submitted),
             CorrelationId: reader.IsDBNull(4) ? null : Guid.Parse(reader.GetString(4)),
             ExecutionId: reader.IsDBNull(21) ? null : Guid.Parse(reader.GetString(21)),
             ParentExecutionId: reader.IsDBNull(22) ? null : Guid.Parse(reader.GetString(22)),

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Audit/AuditRowProjection.cs

@@ -173,7 +173,13 @@ public static class AuditRowProjection
         return evt with { DetailsJson = AuditDetailsCodec.Serialize(d) };
     }
 
-    private static TEnum ParseEnum<TEnum>(string? value, TEnum fallback) where TEnum : struct, Enum
+    /// <summary>
+    /// Case-sensitive <see cref="Enum.TryParse{TEnum}"/> with a caller-supplied fallback.
+    /// Returns <paramref name="fallback"/> when <paramref name="value"/> is null, empty,
+    /// or does not match any declared member name — so callers never throw on an
+    /// unknown/renamed enum string (legacy or corrupt rows degrade gracefully).
+    /// </summary>
+    public static TEnum ParseEnum<TEnum>(string? value, TEnum fallback) where TEnum : struct, Enum
         => !string.IsNullOrEmpty(value) && Enum.TryParse<TEnum>(value, ignoreCase: false, out var parsed)
             ? parsed
             : fallback;

src/ZB.MOM.WW.ScadaBridge.Communication/Grpc/AuditEventDtoMapper.cs

@@ -105,9 +105,9 @@ public static class AuditEventDtoMapper
             EventId: Guid.Parse(dto.EventId),
             OccurredAtUtc: DateTime.SpecifyKind(dto.OccurredAtUtc.ToDateTime(), DateTimeKind.Utc),
             IngestedAtUtc: null,
-            Channel: Enum.Parse<AuditChannel>(dto.Channel),
-            Kind: Enum.Parse<AuditKind>(dto.Kind),
-            Status: Enum.Parse<AuditStatus>(dto.Status),
+            Channel: AuditRowProjection.ParseEnum<AuditChannel>(dto.Channel, AuditChannel.ApiInbound),
+            Kind: AuditRowProjection.ParseEnum<AuditKind>(dto.Kind, AuditKind.InboundRequest),
+            Status: AuditRowProjection.ParseEnum<AuditStatus>(dto.Status, AuditStatus.Submitted),
             CorrelationId: NullIfEmpty(dto.CorrelationId) is { } cid ? Guid.Parse(cid) : null,
             ExecutionId: NullIfEmpty(dto.ExecutionId) is { } eid ? Guid.Parse(eid) : null,
             ParentExecutionId: NullIfEmpty(dto.ParentExecutionId) is { } pid ? Guid.Parse(pid) : null,