#16480
# Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality
* Add sentry
* Fix gosum
* More gosum fixes
* Add missing def for config
* Enrich sentry scope a bit
* Add changes file
* Add goroutine safe scope to errors
* Encapsulate sentry logic
* Add documentation for new flag
* Add sentry capturing to crons and other background tasks
* Only send to sentry when enabled
* Serialize hosts writes per instance
* Write hosts asynchronously
* Dont make the save in a goroutine
* Revert "Dont make the save in a goroutine"
This reverts commit 4a890c5271.
* Make all savehosts async
* Address review comments and make this approach configurable
* Address review comments
* Disable bulk seen time marking for a test
* Move host seen times to a new table
* Remove unused
* Add seen_time to list hosts
* Add some jitter to seen time flushing
* Remove unused
* Add timeout to deferred save host
* Add tests for serialSaveHost
* Update hosts in labels and policy executions in a serial way
* Address review comments and remove fk constraints in host software
* Make errCh buffered
* Add changes file
* Readd key
