Alexander Bocken 1628f8ba23 feat: add Redis caching for recipe queries with automatic invalidation ...

Implements Redis caching layer for recipe endpoints to reduce MongoDB load and improve response times:

- Install ioredis for Redis client with TypeScript support
- Create cache.ts with namespaced keys (homepage: prefix) to avoid conflicts with other Redis applications
- Add caching to recipe query endpoints (all_brief, by tag, in_season) with 1-hour TTL
- Implement automatic cache invalidation on recipe create/edit/delete operations
- Cache recipes before randomization to maximize cache reuse while maintaining random order per request
- Add graceful fallback to MongoDB if Redis is unavailable
- Update .env.example with Redis configuration (REDIS_HOST, REDIS_PORT)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

2026-01-07 20:25:11 +01:00

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