Fix weekend shift initial extraction and update worker start/end dates for leave requests

gen_cons.py

@@ -115,6 +115,8 @@ def extract_shift_assignments_from_rota(rota_df):
                 if col_idx >= len(row):
                     continue
                 initial = str(row.iloc[col_idx]).strip()
+                if weekend:
+                    initial = initial.split("/")[0].strip()  # In case of "initial1/initial2", take the first one
                 if initial and initial.lower() != "nan" and initial.lower() != "nat":
                     if weekend:
                         shift = "weekend"
@@ -209,13 +211,13 @@ def load_workers():
         if initial == "ND":
             start_date = "2025-09-29"  # Non-working day worker starts later
         if initial == "MF":
-            start_date = "2025-10-06"  # Medical leave worker starts earlier
+            start_date = "2026-01-15"  # Medical leave worker starts earlier
         if initial == "AA":
             start_date = "2025-11-17"  # Absent worker starts later
 
         end_date = None
         if initial == "L1":
-            end_date = "2025-11-06"  # L1 worker has a leave request
+            end_date = "2025-11-17"  # L1 worker has a leave request
         elif initial == "L2":
             end_date = "2025-09-29"  # L2 worker has a leave request
 
@@ -393,7 +395,7 @@ def main(
             days=days[:5],
             balance_offset=1,
             constraints=[
-                #{"name": "pre", "options": 1},
+                PreShiftConstraint(days=1, start_date="2025-11-17", ignore_shifts=["oncall"]),
                 #{"name": "post", "options": 1},
             ],
         ),