Auto apply migrations fix

src/Backend/DiunaBI.API/Program.cs

@@ -103,26 +103,35 @@ var app = builder.Build();
 using (var scope = app.Services.CreateScope())
 {
     var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+    var logger = scope.ServiceProvider.GetRequiredService<ILogger<Program>>();
+
+    db.Database.SetCommandTimeout(TimeSpan.FromMinutes(5));
 
     try
     {
-        var pending = await db.Database.GetPendingMigrationsAsync();
-        if (pending.Any())
-        {
-            app.Logger.LogWarning("Applying {Count} pending migrations: {List}",
-                pending.Count(), string.Join(", ", pending));
-            await db.Database.MigrateAsync();
-            app.Logger.LogInformation("Migrations applied successfully.");
-        }
-        else
-        {
-            app.Logger.LogInformation("No pending migrations.");
-        }
+        await db.Database.OpenConnectionAsync();
+
+        await db.Database.ExecuteSqlRawAsync(
+            "EXEC sp_getapplock @Resource = N'DiunaBI_Migrations', @LockMode = 'Exclusive', @LockTimeout = 60000;");
+
+        logger.LogInformation("Ensuring database is up to date...");
+        await db.Database.MigrateAsync();
+        logger.LogInformation("Database is up to date.");
     }
     catch (Exception ex)
     {
-        app.Logger.LogCritical(ex, "Migration failed - application will not start.");
-        throw; // stop startup
+        logger.LogCritical(ex, "Migration failed - application will not start.");
+        throw;
+    }
+    finally
+    {
+        try
+        {
+            await db.Database.ExecuteSqlRawAsync(
+                "EXEC sp_releaseapplock @Resource = N'DiunaBI_Migrations';");
+        }
+        catch { /* ignore */ }
+        await db.Database.CloseConnectionAsync();
     }
 }