refactor: remove reconciliation system and all related code, tasks, and docs

Add TicketStatusHistory model and integrate automatic status logging into ticket assignment workflow.

Fix incorrect router prefix causing self-assign endpoint 404 and update all related documentation.

Remove regional assignment restrictions and update services/docs to allow cross-region ticket pickup.

Implement full dynamic ticket action system with enum rename, self-assign auto-accept, updated assignment logic, and new documentation.

feat: scope notification to a project, added project id to the notifications table as a nullable field

feat(project): add complete project setup workflow with service methods and API endpoints for regions, roles, subcontractors, and finalization including validation and authorization