* SQLStore: Prevent concurrent migrations (#44101) * SQLStore: Prevent concurrent migrations * Hide behind a feature toggle * Configurable locking attempt timeout * Update docs/sources/administration/configuration.md Co-authored-by: Igor Suleymanov <radiohead@users.noreply.github.com> Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com> (cherry picked from commitd718ee1918) * Resolve dependency cycle (#45427) (cherry picked from commit6a38ce2307)