ScyllaDB Open Source Release 3.1.4

ScyllaDB Open Source 3.1.4 is a bugfix release for the ScyllaDB 3.1 stable branch, ensuring backward compatibility and supporting rolling upgrades. This release addresses several issues, including correctness problems with hinted handoff sending counter hints as updates when targeted nodes are absent, and incorrect encoding of negative varint values. It also resolves security concerns with reading YAML from Python and various stability issues like commitlog IO class errors, invalid time UUID causing exits, and crashes during initialization. Performance improvements include preventing cache invalidation when no sstable is added during streaming. A specific upgrade note advises users who installed ScyllaDB 3.1.0 fresh to enable compatibility mode in the configuration file before upgrading to 3.1.4. The release is part of the ongoing support for the 3.x.y series, with plans to discontinue 3.1.x support after the release of version 3.3.