Event ingestion for card views and platform clicks

[ShantKhatri]

Summary

Record a view or click event whenever a card is opened or a platform button is tapped.

Contexts

Needs to hash session tokens before storage and capture source (QR / AirDrop / direct link) plus optional event_id.

Tasks

• Endpoint/hook to log a card_view on open
• Endpoint/hook to log a platform_click on tap
• Hash session token before write, never store raw
• Attach event_id when the view came from a known event

Acceptance Criteria

• Views and clicks are recorded correctly for all three sources
• No raw/reversible identifiers ever hit the DB
• Tests added

Area

backend

Difficulty

Intermediate

[github-actions]

Hi @ShantKhatri,

Thanks for opening this issue.

Please reply with one of the following areas so the issue can be routed to the appropriate team member:

- /backend
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- /mobile
- /devops

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