refactor(namespaces): restore private root

[ycdzj]

This reverts commit 4d95ee3.

[Copilot]

Pull Request Overview

This PR restores the private root resource functionality when adding namespace members, implementing soft delete/restore patterns instead of permanent deletions. The change enables recovery of previously deleted private roots when re-adding users to namespaces.

Key Changes:

• Added restoreResource and deleteResource methods to ResourcesService with transaction support
• Refactored addMember to check for and restore existing deleted namespace members and their private roots
• Extracted private root creation logic into a new createOrRestorePrivateRoot method

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/resources/resources.service.ts	Added soft delete and restore methods for resources with transaction management
src/namespaces/namespaces.service.ts	Refactored member addition to support restoring deleted private roots and consolidated creation logic

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