API and certificate management enhancements and fixes

What's Changed

• Resend tracking fixes by @mrconlisk in #601
• Bump fflate from 0.8.2 to 0.8.3 in /WebUI by @dependabot[bot] in #602
• Add tool to migrate a partnerships XML file into the database by @JakeHuneau in #603
• Add PATCH endpoints so objects can be updated without being deleted by @JakeHuneau in #604
• Update version number and release notes by @uhurusurfa in #605

Full Changelog: v4.11.0...v4.12.0