Sergey Krylov 3b919ecdc6 perf(backend): add dedicated screenerTtl config for screener caching
- Add CACHE_SCREENER_TTL env var (default 900s) to configuration
- Move screener from marketDataTtl to dedicated screenerTtl
- Add test verifying cache key prefix, parts, and TTL config key
- 117 tests pass, build succeeds
2026-06-25 20:25:53 +03:00
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