Rework balances around per-parent days left and deduce the partner from FK

Manual entry now takes one parent's sjukpenningnivå, lägstanivå and
dubbeldagar left (plus optional reserved days) and derives the rest in
build_snapshot, shared with the scraper. The scraper also reads the
family panel and exposes a partner deduction; with two parents it is
saved as a 'deduced' snapshot (migration 002). Parent count is the single
source of entitlement: one member gets 480 days and 96 savable at age 4,
two get 240 and 48 each. Workspaces are capped at two parents.

Also lands the in-flight squash of migrations 002–011 into the initial
schema and the removal of planning_mode.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

backend/app/dependencies.py

@@ -257,7 +257,6 @@ def get_tips_service(
     pd_repo: PersonalDataRepositoryDep,
     vacation_repo: VacationDaysRepositoryDep,
     leave_wish_repo: LeaveWishRepositoryDep,
-    ws_repo: WorkspaceRepositoryDep,
     dismissal_repo: TipDismissalRepositoryDep,
 ) -> TipsService:
     return TipsService(
@@ -267,7 +266,6 @@ def get_tips_service(
         pd_repo,
         vacation_repo,
         leave_wish_repo,
-        ws_repo,
         dismissal_repo,
     )
 
@@ -367,6 +365,7 @@ def get_planning_service(
     parental_leave_repo: ParentalLeaveRepositoryDep,
     vacation_repo: VacationDaysRepositoryDep,
     planning_engine_service: PlanningEngineServiceDep,
+    leave_wish_repo: LeaveWishRepositoryDep,
     uow: UnitOfWorkDep,
 ) -> PlanningService:
     return PlanningService(
@@ -375,6 +374,7 @@ def get_planning_service(
         parental_leave_repo,
         vacation_repo,
         planning_engine_service,
+        leave_wish_repo=leave_wish_repo,
         uow=uow,
     )