* feat(store): init allow messages to be marked as ephemeral
* feat(store): replace ephemeral with ttl model
* Revert "feat(store): replace ephemeral with ttl model"
This reverts commit 4398c61c919dda8f014b4fcc0679c573c74854e4.
* fix(store): flags and test
* chore(store): remove storeTTL
* chore(store): remove unused utils
* fix: conflict
* fix(store): make test more brief