**Related issue:** Resolves#50327
Adds Microsoft ODBC Driver 18 for SQL Server as a Windows
Fleet-maintained app, from winget `Microsoft.msodbcsql.18` (18.6.2.1,
MSI, machine scope, x64, en-US). Sibling of #50342 (driver 17); the two
install side by side and are separate products.
## Verification
Identity read from the MSI Property table:
```
ProductName Microsoft ODBC Driver 18 for SQL Server
Manufacturer Microsoft Corporation
ProductCode {820A3DEC-9783-42AE-B12D-750FCCF07E10}
UpgradeCode {ADA68B65-BFF8-4E6A-B082-CC6682D425B8}
ALLUSERS 1
```
- Installer SHA confirmed against a local download (`20314529…4b82`).
- The UpgradeCode differs from driver 17's (`{0123A210-…}`), which
confirms they are independent products rather than upgrades of one
another. The generated uninstall script picked up 18's, so uninstalling
one will not touch the other.
- Because `ProductName` already carries the major version, the exists
query is a simple equality — no `version LIKE '18.%'` pinning needed,
and no risk of 17 and 18 matching each other.
Like driver 17, the MSI refuses to install without
`IACCEPTMSODBCSQLLICENSETERMS=YES`, which Fleet's default MSI script
does not pass, so this ships a small custom install script. It is
deliberately a **separate file** from driver 17's rather than a shared
path, following the repo's one-script-per-app convention and keeping the
two PRs independently mergeable.
The icon comes from the MSI's own `ARPPRODUCTICON` stream. As with
#50342 it is natively 32×32, so the 128×128 asset is an upscale — happy
to drop it in favour of the generic fallback if reviewers prefer. The
icon map key also needed the same manual correction (the generator
derives it from the slug, which omits "for sql server").
The manifest declares a `Microsoft.VCRedist.2015+.x64` dependency, which
the ingester ignores; we ship `vc-redist-x64/windows` and the
redistributable is present on most hosts.
# Checklist for submitter
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added Microsoft ODBC Driver 18 for SQL Server to the maintained
Windows software catalog.
* Added support for version 18.6.2.1, including installation, upgrade,
uninstall, detection, and license acceptance handling.
* Added the software’s icon and catalog display details.
* Included support for SQL Server and Azure SQL connectivity scenarios.
* Installation now provides appropriate handling for successful
completion, restart requirements, and installation failures.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Co-authored-by: Allen Houchins <allenhouchins@mac.com>
