Add v0.19.0 changelog (#5189)

marks unrelease changes for v0.19.0

#### Does this PR need a docs update or release note?

- [x] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [ ] ⛔ No

#### Type of change

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- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [x] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)

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#### Test Plan

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- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased] (beta)
 
+## [v0.19.0] (beta) - 2024-02-06
+
 ### Added
 - Events can now be exported from Exchange backups as .ics files.
 - Update repo init configuration to reduce the total number of GET requests sent
@@ -494,7 +496,8 @@ this case, Corso will skip over the item but report this in the backup summary.
 - Miscellaneous
   - Optional usage statistics reporting ([RM-35](https://github.com/alcionai/corso-roadmap/issues/35))
 
-[Unreleased]: https://github.com/alcionai/corso/compare/v0.18.0...HEAD
+[Unreleased]: https://github.com/alcionai/corso/compare/v0.19.0...HEAD
+[v0.19.0]: https://github.com/alcionai/corso/compare/v0.18.0...v0.19.0
 [v0.18.0]: https://github.com/alcionai/corso/compare/v0.17.0...v0.18.0
 [v0.17.0]: https://github.com/alcionai/corso/compare/v0.16.0...v0.17.0
 [v0.16.0]: https://github.com/alcionai/corso/compare/v0.15.0...v0.16.0