Problems with keep-alive connection

[lev2p1]

[lev2p1]

Over time, the client resets the connection, but does not inform the server about it, so the server remains with an active connection and the client that disconnected it creates a new one.

[lev2p1]

Server does not close connection after responding to non-existent path.

Steps to reproduce:

1. Send request to /test -> receives 200 OK, connection closes normally
2. Send request to /test123 -> receives 404 Not Found
3. Send request to /test again -> connection hangs, does not close

Expected behavior:

• Connection should close after each response, regardless of status code (200/404)
• Subsequent requests to valid paths should work normally after 404

Suspected cause:

• Server may not be calling close() or co_await on connection after sending 404 response
• Coroutine may be getting stuck when handler is not found for the route
• The async operation may not be completing properly on error path

[lev2p1]

The timeout issue has not been resolved yet.