- Add missing drizzle-orm exports (avg, count) to metadata and sitemap test mocks
- Add missing schema exports (steamReviewSentimentEnum) to metadata and sitemap test mocks
- Add missing schema tables (gameVersions, performanceEntries, gameComments, gamePlatformSupport, user, entryScreenshots) to sitemap test mock
- Remove @/lib/steam/sync mock from metadata test to prevent module mock caching conflicts
- Add auth export to @/lib/auth mock
This fixes 7 pre-existing test failures caused by module mock interference
when test files run in the same process.
adrianbonpin