2 Commits

Author	SHA1	Message	Date
Vladimir Zagainov	c58fbb50b1	feat: implement observability and metrics (Task 22) ... - Add metrics package tracking cache hit-rate, API quota, circuit breaker trips, search time - Integrate metrics with cache layer, yandex client, and API handlers - Add /metrics HTTP endpoint for Prometheus-compatible metrics exposure - Write tests for metrics functionality across cache, yandex, and API handlers - Update test files to support new metrics infrastructure	2026-08-17 15:27:44 +03:00
Vladimir Zagainov	571d11d376	feat: implement cache-aside layer with Redis cache interface, cache keys, TTL policies, and tests ... - Created cache/store.go with Cache interface, redisClient wrapper, cacheStore, TTL constants (CityTTL 30d, SearchNearTermTTL 3h, SearchFarTermTTL 7d) - Implemented cache keys: cities:{code}, stations:{id}, search:{from}:{to}:{date} - Implemented cache-aside pattern via CacheAside struct with GetOrSetFuncPattern, GetCity, GetStation, GetSearch - Added TTL-aware search result caching with near-term (3h) and far-term (7d) policies - Wrote 6 unit tests: CacheGetSet, CacheKeyString, CacheAsideGetOrSet, CacheAsideGetCity, CacheAsideGetSearch, CacheInvalidate - All tests pass with Redis integration	2026-08-13 19:55:02 +03:00