Describe the bug
Error 404/Not found is returned when accessing a indicated URI for a Yang defined notification stream

Branch
Seen on lighty 19.x and also the current 20 main

To Reproduce

1. Use/start any of the existing yang modules in the example apps (eg the lightyr-community-restcinf-actions-app) or define and include in the app a new a yang model with a simple notification element definition.
2. Access http://localhost:8888/restconf/data/ietf-restconf-monitoring:restconf-state/streams to obtain the list of notification streams
3. Access the indicated URI using a curl GET
4. The same behavior is seen when changing the URI to use the restconf/ endpoint instead of the /rests

Expected behavior
Connection to the SSE notification channel should be established.

Screenshots
GET http://localhost:8888/restconf/data/ietf-restconf-monitoring:restconf-state/streams
Returns:

{
"ietf-restconf-monitoring:streams": {
"stream": [
{
"name": "yang-library-update",
"replay-support": true,
"access": [
{
"encoding": "JSON",
"location": "http://localhost:8888/rests/notif/notification-stream/ietf-yang-library:yang-library-update/JSON"
},
{
"encoding": "XML",
"location": "http://localhost:8888/rests/notif/notification-stream/ietf-yang-library:yang-library-update"
}
],
"description": "Generated when any YANG library information on the\nserver has changed."
},
{
"name": "yang-library-change",
"replay-support": true,
"access": [
{
"encoding": "JSON",
"location": "http://localhost:8888/rests/notif/notification-stream/ietf-yang-library:yang-library-change/JSON"
},
{
"encoding": "XML",
"location": "http://localhost:8888/rests/notif/notification-stream/ietf-yang-library:yang-library-change"
}
],
"description": "Generated when the set of modules and submodules supported\nby the server has changed."
},
{
"name": "data-changed-notification",
"replay-support": true,
"access": [
{
"encoding": "JSON",
"location": "http://localhost:8888/rests/notif/notification-stream/sal-remote:data-changed-notification/JSON"
},
{
"encoding": "XML",
"location": "http://localhost:8888/rests/notif/notification-stream/sal-remote:data-changed-notification"
}
],
"description": "Data change notification."
},
{
"name": "uni-admin-status",
"replay-support": true,
"access": [
{
"encoding": "JSON",
"location": "http://localhost:8888/rests/notif/notification-stream/hco-notification:uni-admin-status/JSON"
},
{
"encoding": "XML",
"location": "http://localhost:8888/rests/notif/notification-stream/hco-notification:uni-admin-status"
}
]
}
]
}
}

GET to any of the URIs returns a 404/not found:

GET: http://localhost:8888/rests/notif/notification-stream/ietf-yang-library:yang-library-change/JSON
GET http://localhost:8888/restconf/notif/notification-stream/ietf-yang-library:yang-library-change/JSON
GET http://localhost:8888/rests/notif/notification-stream/hco-notification:uni-admin-status

GET http://localhost:8888/restconf/notif/notification-stream/ietf-yang-library:yang-library-change/JSON

Environment (please complete the following information):
JVM 17

Additional context
The issue also is seen when programmatically a notification is generated.