Add staff reliability stats & shift location

Introduce staff reliability statistics and location fields across domain, data, and UI. Changes include:

- New API endpoint StaffEndpoints.profileStats ('/staff/profile/stats').
- New domain entity StaffReliabilityStats with JSON (de)serialization and export.
- Profile repository: getReliabilityStats implementation and interface addition.
- New GetReliabilityStatsUseCase and DI registration in StaffProfileModule.
- ProfileCubit/state: load and store reliabilityStats; UI wired to display ReliabilityStatsCard and ReliabilityScoreBar using state values.
- Coverage/shift updates: Added AssignedWorker.hasReview to track if a worker was reviewed; added locationName/locationAddress to ShiftWithWorkers and show location in ShiftHeader; hide rate button if worker.hasReview.
- Clock-in handling: treat backend ALREADY_CLOCKED_IN (409) as idempotent by re-fetching attendance and emitting success when appropriate.

These changes wire backend stats through repository/usecase/cubit to the profile UI and add shift location and review-awareness to client views.

apps/mobile/packages/features/staff/clock_in/lib/src/presentation/bloc/clock_in/clock_in_bloc.dart

@@ -228,12 +228,20 @@ class ClockInBloc extends Bloc<ClockInEvent, ClockInState>
             event: event,
             activeShiftId: newStatus.activeShiftId,
           );
-        } on AppException catch (_) {
-          // The clock-in API call failed. Re-fetch attendance status to
-          // reconcile: if the worker is already clocked in (e.g. duplicate
-          // session from Postgres constraint 23505), treat it as success.
+        } on AppException catch (e) {
+          // The backend returns 409 ALREADY_CLOCKED_IN when the worker has
+          // an active attendance session. This is a normal idempotency
+          // signal — re-fetch the authoritative status and emit success
+          // without surfacing an error snackbar.
+          final bool isAlreadyClockedIn =
+              e is ApiException && e.apiCode == 'ALREADY_CLOCKED_IN';
+
+          // Re-fetch attendance status to reconcile local state with
+          // the backend (handles both ALREADY_CLOCKED_IN and legacy
+          // Postgres constraint 23505 duplicates).
           final AttendanceStatus currentStatus = await _getAttendanceStatus();
-          if (currentStatus.isClockedIn) {
+
+          if (isAlreadyClockedIn || currentStatus.isClockedIn) {
             emit(state.copyWith(
               status: ClockInStatus.success,
               attendance: currentStatus,