The test was sending a single object with a "meta" field, but the handler
expects an array of KoboAnalyticsTest objects (matching other Kobo endpoints).
Changed:
- Removed unsupported "meta" field
- Converted single object to array format
- Now matches Kobo protocol pattern used by /markup and /bookmark endpoints
All Kobo tests now pass:
- TestKoboInitialization ✅
- TestKoboLibrarySync ✅
- TestKoboMarkupSync ✅
- TestKoboBookmarkSync ✅
- TestKoboAnalyticsGettests ✅
- TestKoboDeviceHeaderParsing ✅