Similarity fix

[joanreyero]

Changes proposed ✍️

What

🤖[deprecated] Generated by Copilot at a7b0fcf

Added a new sorting criterion to the mergeMembers query in memberRepository.ts to improve the detection of duplicate members. The query now prefers members with a non-null similarity score over those with a null score.
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🤖[deprecated] Generated by Copilot at a7b0fcf

mergeMembers seeks
duplicates with similarity
nulls fall behind

Why

How

🤖[deprecated] Generated by Copilot at a7b0fcf

• Prioritize members with similarity score for merging (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screenshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.