Added `pgroups` to secure and associate data with specific permission groups. Updated backend routers, database models, and API endpoints to handle authorization based on `pgroups`. Adjusted frontend components and hooks to support `pgroups` in data fetching and management workflows.
Replaced usage of "ContactPerson" with "Contact" for consistency across the codebase. Updated related component props, state variables, API calls, and database queries to align with the new model. Also enhanced backend functionality with stricter validations and added support for handling active pgroups in contact management.
