v2.20.2

🐛 Bug Fixes

• f334ad5 - fix another naive datetime issue with scan_all script (PR #3644 by @rpcross)
• f7c9988 - truncate long subject lines to prevent db errors (PR #3643 by @rpcross)
• 359b2e4 - change db character set to utf8mb4 to resolve collation errors. Fixes #3266 (PR #3616 by @rpcross)