fix(mcp): register ticket import tools in the external MCP container

The external MCP server has its own DI container; TicketMcpTools could not
resolve TicketImportService there, so both tools failed at runtime. Also
surface a skipped import in the prime outcome and treat a sweep where every
project board fails as an error instead of an empty backlog.

src/ClaudeDo.Worker/Prime/PrimeRunner.cs

@@ -63,7 +63,11 @@ public sealed class PrimeRunner : IPrimeRunner
     private Task<PrimeRunOutcome> RunImportTicketsAsync(PrimeScheduleDto schedule, CancellationToken ct)
     {
         if (!_tickets.IsConfigured)
-            return RunPrepAsync("Daily prep", log => FillMyDayStepAsync(schedule, log, ct));
+            return RunPrepAsync("Daily prep", async log =>
+            {
+                var day = await FillMyDayStepAsync(schedule, log, ct);
+                return day with { Message = $"Ticket system not configured, import skipped; {day.Message}" };
+            });
 
         return RunPrepAsync("Ticket import", async log =>
         {