Creates a new `GenerateCosmoRouterConfig` function to build and
serialize a Cosmo Router configuration from subgraphs. Implements
PubSub mechanism for managing schema updates, allowing
subscription to updates. Adds Subscription resolver and updates
existing structures to accommodate new functionalities. This
enhances the system's capabilities for dynamic updates and
configuration management.
Add a context with timeout to handle graceful shutdown of the HTTP
server. Update error handling during the server's close to include
context-aware shutdown. Ensure that the server properly logs only
non-closed errors when listening.
argoyle
