feat(identity): redesign identity module and introduce RBAC foundation

- Redesign the Identity module with a richer domain model.
- Extend the User entity to support username, Authentik integration, activity tracking, and storage information.
- Add Role and Permission domain models with many-to-many relationships.
- Implement RBAC foundation using UserRole, RolePermission, and UserPermission mappings.
- Add user storage quota and usage fields with default values.
- Introduce Authentik identifiers and synchronization metadata.
- Refactor user domain logic for role and permission management.
- Update Prisma schema to support the new identity architecture.
- Improve JWT authentication and permission guard integration.
- Update repositories, handlers, controllers, mappers, DTOs, and Swagger configuration.
- Refresh environment configuration and project dependencies.

prisma/migrations/20260801101841_add_authentik_id/migration.sql

@@ -0,0 +1,11 @@
+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[authentikId]` on the table `User` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- AlterTable
+ALTER TABLE "User" ADD COLUMN     "authentikId" TEXT;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_authentikId_key" ON "User"("authentikId");