Evaluate pagination for protected_tags in repository settings

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Problem

Repositories with many tags/branches experience slow loading times even after optimization changes.

Proposed Solutions

1. Pagination - Break matching counts but improve load times
2. Deferred loading - Load tags/branches only when user interacts with UI
3. UI optimization - Review components using tag_names/branch_names

Acceptance Criteria

• Implement pagination for tag/branch loading
• Add deferred loading to relevant UI components
• Measure performance with 5000+ tags
• Maintain good UX despite loading changes

Related: !200286 (merged)