- Implemented `InvoicingPeriodPaginationTest` for testing period pagination modes, normalization of options, search functionality, and visibility filters.
- Added comprehensive tests to validate scenarios such as active period views, exact counts, and customer-card level search.
- Improved cURL timeout settings with `CURLOPT_CONNECTTIMEOUT` and `CURLOPT_TIMEOUT` adjustments.
- Introduced and documented helper classes/methods for local caching, pagination response structure, and customer name retrieval.
- Introduced `invoice_period_flag_schema_bootstrap` to initialize the schema for invoice period flags.
- Added `invoice_period_flag_service` to handle manual and automatic flag creation, updates, filtering, and context resolution.
- Implemented lifecycle methods such as `createManualFlag`, `updateAutomaticFlagStatus`, and `applyFlagsToPeriodTypes` for handling invoice period flags and their usage in processing periods.
- Included context-specific resolution methods for efficient flag management in invoicing workflows.