getApp
Get the fully initialized Hono application instance. If the app has not been
created yet, this method initializes it with all routes, middleware, health checks,
and security headers — the same configuration that serve() would create.
This is primarily used when embedding the agent in a larger Hono application or when deploying to serverless platforms.
Parameters
None.
Returns
Hono — The configured Hono application instance with all agent endpoints
registered.