api-rest

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to realtime
2. Paste url wss://ris-live.ripe.net/v1/ws/?client=hoppscotch.io
3. Observe connect is disabled
4. Remove parameter, quickly undo it and click connect (also a bug)
5. Send { "type": "ris_subscribe" } to the remote server
6. Observe you receive

Sometimes it might be handy to easily get a header's value as int, where validation errors would automatically result in an HTTP 400, along the lines of req.get_header_as_datetime & [req.get_param_as_int](https://falcon.readthedocs.io/en/stable/api/request_and_response_wsgi.ht

I propose to remove the pass_context_arg_name argument and fix the name under which the context is passed. This parameter is passed often between internal functions and classes, which is not worth the benefit of having it configurable.

What would you like to be added:
A Fault injection filter should provide configurable error injection capabilities, such as delay, error local reply. it is best to have more detailed routing-based configuration capabilities

Why is this needed:
Because this is the ability that is required in the testing phas