preInstantiateSingletons abstract method
Pre-instantiates all singleton pods.
This method creates all singleton pods upfront, which can improve first-request performance at the cost of slower application startup.
Usage Example:
// During application startup for better runtime performance
await factory.preInstantiateSingletons();
print('All singletons have been instantiated');
@return A Future that completes when all singletons are instantiated
Implementation
Future<void> preInstantiateSingletons();