Fixes#31580
Fixes issues
- When updating a script to exactly match the content of another script,
we fail
- When updating one script which happens to match content of another
script, both get updated and not just the one being edited
# 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/guides/committing-changes.md#changes-files)
for more information.
## Testing
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Bug Fixes**
* Resolved error when updating a script to exactly match another
script’s contents.
* Improved handling of script content updates: identical contents are
deduplicated and unused versions are cleaned up.
* Scheduled/pending runs are canceled on content updates with clearer
cancellation messaging.
* **Documentation**
* Added changelog entry describing the fix.
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