feat(worker): compute prime due-time from weekday bitmask

Also fixes PrimeScheduleRepository.ListAsync to sort client-side
(SQLite EF Core does not support TimeSpan in ORDER BY clauses).

src/ClaudeDo.Data/Repositories/PrimeScheduleRepository.cs

@@ -12,10 +12,8 @@ public sealed class PrimeScheduleRepository
 
     public async Task<IReadOnlyList<PrimeScheduleEntity>> ListAsync(CancellationToken ct = default)
     {
-        var rows = await _context.PrimeSchedules.AsNoTracking()
-            .OrderBy(s => s.TimeOfDay)
-            .ToListAsync(ct);
-        return rows;
+        var rows = await _context.PrimeSchedules.AsNoTracking().ToListAsync(ct);
+        return rows.OrderBy(s => s.TimeOfDay).ToList();
     }
 
     public async Task<PrimeScheduleEntity?> GetAsync(Guid id, CancellationToken ct = default) =>