Add constraints for maximum days and unique shifts per week block in worker model

gen_cons.py

@@ -15,7 +15,7 @@ from rota_generator.workers import (
     NonWorkingDays,
     WorkRequests,
     PreferenceNotToWork,
-    OutOfProgramme,
+    OutOfProgramme, MaxUniqueShiftsPerWeekBlockConstraint,
 )
 
 from loguru import logger
@@ -465,6 +465,8 @@ def load_workers():
             else:
                 w.add_hard_day_dependency({"Fri", "Sun"})
                 w.add_hard_day_exclusion({"Sat", "Sun"})
+        else:
+            w.max_unique_shifts_per_week_block = [MaxUniqueShiftsPerWeekBlockConstraint(week_block=1, max_unique_shifts=1)]