fix(worker): fix Bandel ticket sync and reactivate the integration

The status PATCH needs statusName alongside statusId or the API 400s,
so every write-back had been silently failing. The board's flat
assigneeName is null on every live ticket; the real assignee list is
ticketAssignees[]. Import now also picks up In Bearbeitung tickets,
not just Offen ones.

Both issues are live-verified against the real API, so the feature
flag flips back on.

src/ClaudeDo.Worker/Tickets/TicketImportService.cs

@@ -16,7 +16,9 @@ public sealed record TicketImportResult(int Examined, int Created);
 /// </summary>
 public sealed class TicketImportService
 {
-    private const int StatusOffen = 1;
+    // Offen UND In Bearbeitung: ein Ticket, an dem schon gearbeitet wird, ist genauso ein
+    // Arbeitsauftrag wie ein neues. Fertig/Archiviert bleiben draußen.
+    private static readonly int[] ImportableStatuses = [1, TicketStatusMap.InBearbeitung];
 
     private readonly TicketClientFactory _clients;
     private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
@@ -48,8 +50,8 @@ public sealed class TicketImportService
         var board = await client.GetProjectBoardAsync(projectId, ct);
 
         var mine = board
-            .Where(t => t.StatusId == StatusOffen)
-            .Where(t => string.Equals(t.AssigneeName, identity.UserName, StringComparison.OrdinalIgnoreCase))
+            .Where(t => ImportableStatuses.Contains(t.StatusId))
+            .Where(t => IsAssignedTo(t, identity.UserName))
             .ToList();
 
         var known = await ctx.Tasks.AsNoTracking()
@@ -87,6 +89,16 @@ public sealed class TicketImportService
         return new TicketImportResult(board.Count, created);
     }
 
+    /// <summary>
+    /// Zuweisung ausschließlich über <c>ticketAssignees</c> — das flache <c>assigneeName</c> ist
+    /// live auf jedem Ticket null (siehe <see cref="TicketBoardItem"/>). Ein Ticket kann mehrere
+    /// Zuweisungen haben; eine davon muss der Token-Inhaber sein.
+    /// </summary>
+    private static bool IsAssignedTo(TicketBoardItem ticket, string userName)
+        => ticket.TicketAssignees?.Any(
+               a => string.Equals(a.AssigneeName, userName, StringComparison.OrdinalIgnoreCase))
+           ?? false;
+
     private static string BuildDescription(TicketBoardItem ticket)
     {
         var body = string.IsNullOrWhiteSpace(ticket.Description) ? "" : ticket.Description.Trim() + "\n\n";