Filter out self-views, bots, and crawlers

[ShantKhatri]

Summary

Make sure a card owner's own views and non-human traffic don't pollute their analytics.

Contexts

Called out explicitly as an edge case in the spec. Needs a bot/crawler detection approach (user agent checks, rate heuristics, or similar) and a way to detect the owner viewing their own card.

Tasks

• Detect and exclude owner viewing their own card
• Add bot/crawler filtering on ingestion
• Add a test suite of known bot user agents to guard against regressions

Acceptance Criteria

• Owner's own views never counted
• Common bots/crawlers excluded
• Tests added

Area

backend

Difficulty

Intermediate

[github-actions]

Hi @ShantKhatri,

Thanks for opening this issue.

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- /backend
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