[Backend] Improve media uploads

[dyzhuu]

🌟 Description

Currently, If I want to upload multiple media files, it is an extremely long process , taking time to upload the media, and especially with gallery, creating the corresponding media and gallery data.

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🎯 Acceptance Criteria

• Research into what we can do to reduce this latency

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📊 Definition of Done (DoD)

• Acceptance criteria met
• Agreed tests written
• Agreed documentation in GitHub wiki
• PR reviewed

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🔗 Dependencies

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📚 Additional Context