Dual device on weekend feature

backend/app.py

@@ -75,6 +75,8 @@ class CompileScheduleRequest(BaseModel):
 	start_date: str | None = Field(default=None, description="YYYY-MM-DD")
 	rule: str = ""
 	daytime_testing_today: bool = False
+	dual_device_weekend_start_enabled: bool = False
+	dual_device_weekend_start_dates: list[str] = Field(default_factory=list)
 	top_priority_tests: list[str] = Field(default_factory=list)
 	lowest_priority_tests: list[str] = Field(default_factory=list)
 
@@ -378,6 +380,8 @@ def compile_schedule_endpoint(request: CompileScheduleRequest) -> dict[str, Any]
 		start_date=request.start_date,
 		holiday_dates=holiday_dates,
 		daytime_testing_today=request.daytime_testing_today,
+		dual_device_weekend_start_enabled=request.dual_device_weekend_start_enabled,
+		dual_device_window_start_dates=set(item.strip() for item in request.dual_device_weekend_start_dates if item.strip()),
 	)
 
 	try: