Auto apply EF migrations on startup

BimAI.API/Program.cs

@@ -83,6 +83,33 @@ builder.Services.AddCors(options =>
 
 var app = builder.Build();
 
+// Auto-apply migrations on startup
+using (var scope = app.Services.CreateScope())
+{
+    var db = scope.ServiceProvider.GetRequiredService<BimAIDbContext>();
+
+    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.");
+        }
+    }
+    catch (Exception ex)
+    {
+        app.Logger.LogCritical(ex, "Migration failed - application will not start.");
+        throw; // stop startup
+    }
+}
+
 if (app.Environment.IsDevelopment())
 {
     app.UseSwagger();