Re-enable database creation check to prevent crash when database doesn't exist

.github/upgrades/scenarios/new-dotnet-version_02bc64/scenario.json

@@ -3,7 +3,7 @@
   "operationId": "02bc6448-a69d-4ff4-a0ec-0db07ec3a09a",
   "description": "Upgrade solution or project to new version of .NET",
   "startTime": "2026-03-05T22:18:32.3921759Z",
-  "lastUpdateTime": "2026-03-08T15:19:52.8660692Z",
+  "lastUpdateTime": "2026-03-08T15:28:04.385292Z",
   "stage": "Execution",
   "properties": {},
   "folderPath": ""

Jellyfin.Server/Migrations/JellyfinMigrationService.cs

@@ -238,16 +238,15 @@ internal class JellyfinMigrationService
         var dbContext = await _dbContextFactory.CreateDbContextAsync().ConfigureAwait(false);
         await using (dbContext.ConfigureAwait(false))
         {
-            // DISABLED for .NET 11 preview: Database creation handled by PostgresDatabaseProvider using SQL scripts
-            // Ensure the migration history table exists before querying it
-            /*
+            // Ensure database exists before querying migration history
+            // Note: This does NOT run migrations, it only ensures the database itself exists
             var databaseCreator = dbContext.Database.GetService<IDatabaseCreator>() as IRelationalDatabaseCreator;
             if (databaseCreator is not null && !await databaseCreator.ExistsAsync().ConfigureAwait(false))
             {
-                logger.LogInformation("Database does not exist, creating...");
+                logger.LogInformation("Database does not exist, creating empty database...");
                 await databaseCreator.CreateAsync().ConfigureAwait(false);
+                logger.LogInformation("Empty database created successfully");
             }
-            */
 
             var historyRepository = dbContext.GetService<IHistoryRepository>();