feat: add accountName field to User model with unique constraint

[younocode]

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[Copilot]

Pull Request Overview

This PR adds an accountName field to the User model to provide an auto-generated unique identifier for each user account. The field is optional and automatically populated during user creation if not provided.

• Added accountName field to the User model in Prisma schemas with unique constraint
• Created database migration files for SQLite and PostgreSQL
• Implemented generateAccountName() function to auto-generate account names with the prefix 'acn'

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/db-main-prisma/prisma/template.prisma	Added optional accountName field with unique constraint to User model
packages/db-main-prisma/prisma/sqlite/schema.prisma	Added accountName field to SQLite-specific User schema
packages/db-main-prisma/prisma/sqlite/migrations/20251105051541_add_users_account_name/migration.sql	SQLite migration to add account_name column and unique index
packages/db-main-prisma/prisma/postgres/schema.prisma	Added accountName field to PostgreSQL-specific User schema
packages/db-main-prisma/prisma/postgres/migrations/20251105051609_add_users_account_name/migration.sql	PostgreSQL migration to add account_name column and unique index
packages/core/src/utils/id-generator.ts	Added AccountName prefix and generateAccountName() function
apps/nestjs-backend/src/features/user/user.service.ts	Modified user creation to auto-generate accountName if not provided

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