Postgres has learned caching. However it is usually a longer term thing. Instead lets cache with scylla.

• Cache get data by run, time, fault, etc. roputes
• DO NOT cache car config, any other config, or the get runs or nodes endpoints. Just endpoints that deal with immutable data
• Use something that integrates well with axum
• Ensure max memory is eithier runtime configurable or set conservatively (under 1 gb)

Use a axum integrated caching library layer and bind only some endpoints to that layer. Configure appropriately. Avoid dedicated servers like redis, etc. Persistence not needed.