[DB] Redis Caching Layer Implementation

[llinsss]

Description
Implement a comprehensive Redis caching strategy for frequently accessed data including pet profiles, veterinary information, and session data.
Acceptance Criteria:

• Cache pet profiles accessed via QR scans
• Cache veterinarian verification status
• Cache user sessions and permissions
• Implement cache invalidation strategies
• Monitor cache hit rates and performance
  Technical Requirements:
• Use @nestjs/cache-manager with Redis
• Implement cache decorators for repositories
• Create cache invalidation events
• Add cache warming strategies
• Monitor cache performance metrics

[nissinanlung]

@nissinanlung has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I would love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @nissinanlung to this issue.

[drips-wave]

Congratulations, @nissinanlung! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @nissinanlung: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

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