Fix: optimize CI analytics repo limit from 5 to 3

[sakshiwankhade026-coder]

Summary

Optimized CI analytics by reducing the number of top repositories fetched from 5 to 3. This improves performance and reduces unnecessary processing.

Closes #1611

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Type of Change

• Bug fix
• Performance improvement
• New feature
• Documentation update
• Refactor / code cleanup

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Changes Made

• Reduced repository limit from 5 to 3 in CI analytics
• Improved performance of analytics processing
• Reduced API/data processing overhead

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Testing

• Tested locally
• Verified output change in analytics result

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Checklist

• Code is clean and minimal change
• No breaking changes introduced
• Self-reviewed the code

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[github-actions]

GSSoC Label Checklist 🏷️

@Priyanshu-byte-coder — please apply the appropriate labels before merging:

Difficulty (pick one):

• level:beginner — 20 pts
• level:intermediate — 35 pts
• level:advanced — 55 pts
• level:critical — 80 pts

Quality (optional):

• quality:clean — ×1.2 multiplier
• quality:exceptional — ×1.5 multiplier

Validation (required to score):

• gssoc:approved — counts for points
• gssoc:invalid / gssoc:spam / gssoc:ai-slop — does not score

Type labels (type:*) are auto-detected from files and title. Review and adjust if needed.
Points formula: (difficulty × quality_multiplier) + type_bonus