feat: add profile view analytics dashboard for card owners

[Nareshkumawat-star]

Feature Request

Card owners currently have no way to see how many people viewed their DevCard, from where, or via which sharing method. An analytics dashboard would make DevCard much more useful for networking.

Proposed Features

• Total card views (all time / last 30 days/ last 7 days)
• Views by source: QR scan, direct link, NFC, README badge
• Unique visitors vs repeat views
• Contact saves count
• Geographic breakdown (country-level, privacy-safe)

Backend

• Log view events to a card_views table with source, timestamp, country (from IP geo)
• Expose aggregated stats via GET /api/v1/me/analytics

Privacy

No personally identifiable viewer data stored — only anonymous aggregates.

[github-actions]

Hi @Nareshkumawat-star,

Thanks for opening this issue.

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