Refactored Worker to accept IConfiguration and read the delay interval from "Worker:DelayMilliseconds" in appsettings.json, replacing the previously hardcoded value. This allows the worker execution interval to be configured without code changes. Added a minimum delay safeguard and updated appsettings.json accordingly.
Created a new EnvelopeGenerator.ServiceHost project targeting .NET 8.0. Set up minimal API host with controllers, Swagger/OpenAPI support, and development configuration files. Updated solution to include the new project with appropriate build settings.
