<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#34500 and Resolves#33758
Video demo: https://www.youtube.com/watch?v=4HZlKG0G1B0
- Added a new aggregation table
`operating_system_version_vulnerabilities` for faster queries. The table
is currently used only for Linux vulnerabilities, but could be used for
other OS vulnerabilities.
- Added `max_vulnerabilities` parameter per [API
doc](https://github.com/fleetdm/fleet/pull/33533)
- Also added `max_vulnerabilities` parameter to `os_versions/{id}`
endpoint, but not making it public since that endpoint is still slow and
needs other API changes. bug #34974
- Removed `"kernels": []` from `os_versions` endpoint result
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
## Testing
- [x] Added/updated automated tests
- [x] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)
- [x] QA'd all new/changed functionality manually
## Database migrations
- [x] Checked schema for all modified table for columns that will
auto-update timestamps during migration.
- [x] Confirmed that updating the timestamps is acceptable, and will not
cause unwanted side effects.
- [x] Ensured the correct collation is explicitly set for character
columns (`COLLATE utf8mb4_unicode_ci`).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added ability to limit the number of vulnerabilities displayed for
operating system versions via an optional parameter.
* Introduced vulnerability count tracking for operating system versions,
now visible in API responses and UI displays.
* Enhanced operating system vulnerability visualization with improved
count-based rendering.
* **Tests**
* Added comprehensive test coverage for vulnerability limiting behavior
across multiple operating system versions and architectures.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
#20385
See notes on that issue for API limitations (which is why Windows and
macOS are the only platforms listed).
Will move out of draft after adding the changes file and tests.
# Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/Committing-Changes.md#changes-files)
for more information.
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality
