[C# APIView] incorrectly displays package version (mislabeling issue)

## Problem
APIView is displaying an incorrect package version in the UI and database records, even though the token file contains the correct version.

## Example
- **Package:** `Azure.Messaging.EventGrid.SystemEvents`
- **Actual version** (in token file): `1.0.0.0`
- **Displayed version** (in APIView UI/records): `1.0.0-beta.4`

## Evidence
- Build: [20250624.2](link-to-build)
- The token file clearly shows `"PackageVersion":"1.0.0.0"`:
```json
{"Version":0,"VersionString":"29.8","Language":"C#","PackageName":"Azure.Messaging.EventGrid.SystemEvents","PackageVersion":"1.0.0.0","Tokens":[],"Diagnostics":[],"ParserVersion":"29.8","ReviewLines":