- Enhanced `getTransactionsWithItemsNotIncludedInInvoices` to aggregate total subscription prices and calculate department-based distribution.
- Added processing to parse department IDs into human-readable names.
- Updated response to include aggregated subscription results under `collective_subscription_results`.
- Added `attemptSubscriptionFallbacks` method in `InvoicingPeriodRoute` to handle vehicle subscription fallbacks through department-based strategies.
- Enhanced `customer_vehicles_o` with `getLastTransactions` for retrieving recent transactions.
- Updated `users_o` to support nullable return type for `getDefaultDepartment`.
- Introduced new endpoints for invoicing distribution: `/superuser/invoicing/period/distribution/fixed-pricing` and `/superuser/invoicing/period/distribution/wash-subscriptions`.
- Enhanced `customer_vehicles_o` with `getSubscriptionAppliedTransactionsFromList` method for transaction filtering based on subscriptions.
- Added `getNetAmountForOrderItemsOriginal` to `orders_o` for calculating the original net amount of order items.
- Introduced parsing utilities for department-based aggregation in invoicing.
- Extended `products_o` with `getSubscriptionMonthlyPrice` to calculate subscription pricing.
- Added `getFieldsWhereIn` to `db_object_t` for advanced database querying.