Add roles and departments

[GDay]

This will allow admins/managers to add users to their own departments in specific roles.

[Copilot]

Pull Request Overview

Adds role management within departments, including CRUD views, templates, drag-and-drop assignment of users to roles, and supporting model, selectors, factories, and tests.

• Introduces Role model and Department–Sequence relationship.
• Adds views, URLs, templates, and JS for managing departments and roles and assigning users to roles.
• Provides test coverage for creating/updating departments and roles and assigning users.

Reviewed Changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
back/users/selectors.py	Adds role selector and distinct filters supporting role assignment logic.
back/users/models.py	Introduces Role model and Department.sequences relation enabling role-feature associations.
back/users/migrations/0045_department_sequences_role.py	Migration creating Role model and Department.sequences field.
back/users/factories.py	Adds RoleFactory for test/data setup.
back/conftest.py	Registers RoleFactory for pytest fixtures.
back/admin/people/views.py	Removes legacy department views superseded by new department_views module.
back/admin/people/urls.py	Routes updated to use new department and role views including add/update endpoints.
back/admin/people/department_views.py	New views for listing, creating, updating departments/roles and assigning users.
back/admin/people/templates/departments.html	Replaces simple list with drag-and-drop UI and user list.
back/admin/people/templates/_departments_list.html	Partial rendering departments, roles, and users per role.
back/admin/people/templates/department_update.html	Department update form plus roles display.
back/admin/people/templates/role_create.html	Role creation form template.
back/admin/people/templates/role_update.html	Role update form template.
back/admin/people/tests/department_tests.py	Adds tests for department/role CRUD and user-role assignment.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Pull Request Overview

Copilot reviewed 14 out of 15 changed files in this pull request and generated 8 comments.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[cscheng]

The general approach for this functionality is fine. I have a bunch of comments and suggestions at the detail/code level, but in my testing it looks like there are a few things missing (that may be are already planned in a future PR?):

1. How is deletion of departments handled?
2. How is deletion of roles handled?
3. What if a manager accidentally drags and drops a user to the incorrect role? This action cannot be undone.

[compgeniuses]

is this PR ready to merge and release, together with #572 ?

[GDay]

@compgeniuses not yet. These features are pretty much done, they are sponsored by a company and we are still in talks about the final touches.