ScyllaDB Open Source Release 3.1.1

ScyllaDB Open Source 3.1.1 is a bugfix release that addresses several issues in the ScyllaDB 3.1 stable branch, particularly focusing on the upgrade path from version 3.0.x to 3.1.x, where internode read or write requests could fail during rolling upgrades due to TTL incompatibilities. Users who installed ScyllaDB 3.1.0 fresh must modify the scylla.yaml configuration file to enable compatibility mode before upgrading to this release. The update also includes fixes for stability issues related to handling schema alterations and cache evictions that could lead to node crashes. The release maintains backward compatibility and supports rolling upgrades, ensuring a seamless transition for users upgrading from older versions.